Chomusikara Mandega 1
- Domboshawa School, Composer not specified, Tracey, Hugh
- Authors: Domboshawa School , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Zimbabwe City not specified f-rh
- Language: Shona
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/316472 , vital:59831 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP2771-XYZ6283a
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
- Authors: Domboshawa School , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Zimbabwe City not specified f-rh
- Language: Shona
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/316472 , vital:59831 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP2771-XYZ6283a
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
Closing song
- Sotho singers, Performer not specified, Composer not specified, Tracey, Hugh
- Authors: Sotho singers , Performer not specified , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Lesotho city not specified f-lo
- Language: Sotho
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/344825 , vital:63184 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP3920-0001
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
- Authors: Sotho singers , Performer not specified , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Lesotho city not specified f-lo
- Language: Sotho
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/344825 , vital:63184 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP3920-0001
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
Cock Crowing
- Performer not specified, Composer not specified, Tracey, Hugh
- Authors: Performer not specified , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Country not specified city not specified f-
- Language: Language not specified
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/344902 , vital:63193 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP3923-6
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
- Authors: Performer not specified , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Country not specified city not specified f-
- Language: Language not specified
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/344902 , vital:63193 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP3923-6
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
Construction of a wide-frequency range double heterodyne conductance bridge and its use in the investigation of polarisation errors in conductance measurements
- Authors: Govinden, Herby Silvester
- Date: 1961
- Subjects: Electrodynamics Electrolytes -- Conductivity
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5522 , http://hdl.handle.net/10962/d1012074
- Description: (1) Developments in a.c. conductance techniques during the past ninety years have been reviewed, and a brief outline is given of the older theories regarding electrolytic polarisation. (2) A conductance bridge - incorporating the double heterodyne principle - has been constructed, capable of giving resistance readings to an accuracy of 0.01% over a range of frequencies covering the best part of 100 kc/s. It has also been found possible to calibrate the oscillator so that frequency settings can be guaranteed to an accuracy of , at least, 0.1% in the range: 2 kc/S to 50 kc/S. (3) The Wheatstone Bridge Network has been slightly modified to enable measurements at the high frequencies. (4) Resistances in the measuring arm of the bridge have been calibrated 'in situ' by the method of intercomparison. (5) A brief description is given of the modern theories regarding electrode processes and modern methods of eliminating electrode effects. (6) Two types of conductance cells, with bright Pt electrodes, have been used to carry out measurements on potassium chloride solutions: (a) Thomas- Gledhill Cell (b) Nichol-Fuoss Cell. The latter incorporates concentric, cylindrical electrodes with the lead to the outer electrode acting as an electrical shield for the lead to the inner electrode. This cell was constructed and used for the first time in this laboratory. (7) From resistance-frequency graphs plotted, it is shown that the Jones and Christian extrapolation procedure cannot be applied (with any degree of confidence) to obtain the true resistance, when measurements are effected over an extended range of frequencies. (8) The method of resistance-reactance diagrams is discussed and applied to various networks of resistances and capacitances. (9) By drawing resistance-reactance diagrams for the experimental readings obtained, equivalent circuits have been derived - for all the solutions investigated in the N-F cell, and for the approx. O.OlD solution in the T-G cell - which approximate to cell behaviour in the range: 500 c/s to 75 kc/s. The less concentrated solutions in the T-G cell show peculiar behaviour at the high frequencies. (10) Probable reasons are advanced for deviations from linearity on resistance-frequency graphs. (11) A new method is proposed for determining the true resistance of solutions measured in cells of the N-F type. Summary, p. 166-167.
- Full Text:
- Date Issued: 1961
- Authors: Govinden, Herby Silvester
- Date: 1961
- Subjects: Electrodynamics Electrolytes -- Conductivity
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5522 , http://hdl.handle.net/10962/d1012074
- Description: (1) Developments in a.c. conductance techniques during the past ninety years have been reviewed, and a brief outline is given of the older theories regarding electrolytic polarisation. (2) A conductance bridge - incorporating the double heterodyne principle - has been constructed, capable of giving resistance readings to an accuracy of 0.01% over a range of frequencies covering the best part of 100 kc/s. It has also been found possible to calibrate the oscillator so that frequency settings can be guaranteed to an accuracy of , at least, 0.1% in the range: 2 kc/S to 50 kc/S. (3) The Wheatstone Bridge Network has been slightly modified to enable measurements at the high frequencies. (4) Resistances in the measuring arm of the bridge have been calibrated 'in situ' by the method of intercomparison. (5) A brief description is given of the modern theories regarding electrode processes and modern methods of eliminating electrode effects. (6) Two types of conductance cells, with bright Pt electrodes, have been used to carry out measurements on potassium chloride solutions: (a) Thomas- Gledhill Cell (b) Nichol-Fuoss Cell. The latter incorporates concentric, cylindrical electrodes with the lead to the outer electrode acting as an electrical shield for the lead to the inner electrode. This cell was constructed and used for the first time in this laboratory. (7) From resistance-frequency graphs plotted, it is shown that the Jones and Christian extrapolation procedure cannot be applied (with any degree of confidence) to obtain the true resistance, when measurements are effected over an extended range of frequencies. (8) The method of resistance-reactance diagrams is discussed and applied to various networks of resistances and capacitances. (9) By drawing resistance-reactance diagrams for the experimental readings obtained, equivalent circuits have been derived - for all the solutions investigated in the N-F cell, and for the approx. O.OlD solution in the T-G cell - which approximate to cell behaviour in the range: 500 c/s to 75 kc/s. The less concentrated solutions in the T-G cell show peculiar behaviour at the high frequencies. (10) Probable reasons are advanced for deviations from linearity on resistance-frequency graphs. (11) A new method is proposed for determining the true resistance of solutions measured in cells of the N-F type. Summary, p. 166-167.
- Full Text:
- Date Issued: 1961
Crowing cock
- Performer not specified, Composer not specified, Tracey, Hugh
- Authors: Performer not specified , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Country not specified city not specified f-
- Language: Language not specified
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/345023 , vital:63224 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP3925-6
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
- Authors: Performer not specified , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Country not specified city not specified f-
- Language: Language not specified
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/345023 , vital:63224 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP3925-6
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
Doves
- Performer not specified, Composer not specified, Tracey, Hugh
- Authors: Performer not specified , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Country not specified city not specified f-
- Language: Language not specified
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/344839 , vital:63186 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP3922-1
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
- Authors: Performer not specified , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Country not specified city not specified f-
- Language: Language not specified
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/344839 , vital:63186 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP3922-1
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
Drum rhythm
- Performer not specified, Composer not specified, Tracey, Hugh
- Authors: Performer not specified , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Country not specified city not specified f-
- Language: Language not specified
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/345041 , vital:63227 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP3925-6
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
- Authors: Performer not specified , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Country not specified city not specified f-
- Language: Language not specified
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/345041 , vital:63227 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP3925-6
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
East London 3326
- Trigonometrical Survey (South Africa)
- Authors: Trigonometrical Survey (South Africa)
- Date: 1961
- Subjects: 1 : 25000 30.5595° S, 22.9375° E , East London (South Africa) Maps , South Africa History 1910-1961 Maps
- Language: English
- Type: maps , digital maps , cartographic
- Identifier: http://hdl.handle.net/10962/112479 , vital:33588 , Cory Library for Humanities Research, Rhodes University Library, Grahamstown, South Africa , MP548
- Description: 3326 East London, South Africa 1:25000 sheet. Compiled and drawn in 1961 by the Trigonometric Survey Office. Magesterial districts as at November 1960. T.S.O. 404/977. (Saamgestel in 1960 en geteken in 1960 deur die Driehokesmatings Kantoor.)
- Full Text: false
- Date Issued: 1961
- Authors: Trigonometrical Survey (South Africa)
- Date: 1961
- Subjects: 1 : 25000 30.5595° S, 22.9375° E , East London (South Africa) Maps , South Africa History 1910-1961 Maps
- Language: English
- Type: maps , digital maps , cartographic
- Identifier: http://hdl.handle.net/10962/112479 , vital:33588 , Cory Library for Humanities Research, Rhodes University Library, Grahamstown, South Africa , MP548
- Description: 3326 East London, South Africa 1:25000 sheet. Compiled and drawn in 1961 by the Trigonometric Survey Office. Magesterial districts as at November 1960. T.S.O. 404/977. (Saamgestel in 1960 en geteken in 1960 deur die Driehokesmatings Kantoor.)
- Full Text: false
- Date Issued: 1961
Ficus sansibarica - Wild Fig
- Authors: Skead, C J (Cuthbert John)
- Date: 1961
- Subjects: Ficus sansibarica -- South Africa -- Photographs , Trees -- South Africa -- Photographs
- Language: English
- Type: mixed material , photographs , landscape photographs
- Identifier: http://hdl.handle.net/10962/121862 , vital:35154
- Description: Caption "Roots of Wild Figs F. capensis growing down rock face at Great Kei River drifto. 1961."
- Full Text: false
- Date Issued: 1961
- Authors: Skead, C J (Cuthbert John)
- Date: 1961
- Subjects: Ficus sansibarica -- South Africa -- Photographs , Trees -- South Africa -- Photographs
- Language: English
- Type: mixed material , photographs , landscape photographs
- Identifier: http://hdl.handle.net/10962/121862 , vital:35154
- Description: Caption "Roots of Wild Figs F. capensis growing down rock face at Great Kei River drifto. 1961."
- Full Text: false
- Date Issued: 1961
Fishes of the family Anthiidae
- Smith, J.L.B. (James Leonard Brierley), 1897-1968
- Authors: Smith, J.L.B. (James Leonard Brierley), 1897-1968
- Date: 1961
- Subjects: Ground beetles , Fishes -- Classification , Fishes -- Indian Ocean , Fishes -- Red Sea
- Language: English
- Type: Text
- Identifier: vital:14984 , http://hdl.handle.net/10962/d1018951 , Ichthyological Bulletin; No. 21
- Description: These fishes are generally assigned to the family Serranidae, one of the most diverse and cumbersome groups of fishes. Containing numerous ill-assorted types this family for convenience at least merits sub-division. One of the natural sub-groups, generally given sub-family status as the Anthiinae, but here given full family rank, consists mainly of small, brilliant, free-swimming coral haunting types confined almost exclusively to tropical seas. These d iffer from the Serranidae proper in the absence of a supramaxilla, in having larger scales, in the dentition, and mostly in the concave or lunate caudal. Although by most workers assigned without question to the Serranidae (sensustricto) the monotypic genus Variola Swainson, 1839 has distinct affinities with the Anthiidae. The dentition, lunate caudal and the brilliant colouration accord better with the Anthiid than with the Serranid fishes. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1961
- Authors: Smith, J.L.B. (James Leonard Brierley), 1897-1968
- Date: 1961
- Subjects: Ground beetles , Fishes -- Classification , Fishes -- Indian Ocean , Fishes -- Red Sea
- Language: English
- Type: Text
- Identifier: vital:14984 , http://hdl.handle.net/10962/d1018951 , Ichthyological Bulletin; No. 21
- Description: These fishes are generally assigned to the family Serranidae, one of the most diverse and cumbersome groups of fishes. Containing numerous ill-assorted types this family for convenience at least merits sub-division. One of the natural sub-groups, generally given sub-family status as the Anthiinae, but here given full family rank, consists mainly of small, brilliant, free-swimming coral haunting types confined almost exclusively to tropical seas. These d iffer from the Serranidae proper in the absence of a supramaxilla, in having larger scales, in the dentition, and mostly in the concave or lunate caudal. Although by most workers assigned without question to the Serranidae (sensustricto) the monotypic genus Variola Swainson, 1839 has distinct affinities with the Anthiidae. The dentition, lunate caudal and the brilliant colouration accord better with the Anthiid than with the Serranid fishes. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1961
Fishes of the family Apogonidae of the Western Indian Ocean and the Red Sea
- Smith, J.L.B. (James Leonard Brierley), 1897-1968
- Authors: Smith, J.L.B. (James Leonard Brierley), 1897-1968
- Date: 1961
- Subjects: Cardinalfishes , Fishes -- Classification , Fishes -- Indian Ocean , Fishes -- Red Sea
- Language: English
- Type: Text
- Identifier: vital:14985 , http://hdl.handle.net/10962/d1018952 , Ichthyological Bulletin; No. 22
- Description: Fishes of the family Apogonidae of the Western Indian Ocean and the Red Sea. Small and relatively feeble as most of these fishes are many cover an astonishing range. Some are found over truly vast areas of the Indo-Pacific, ranging from Southern Africa to the mid-Pacific. As a result, workers on even mid-Pacific Apogonidae need to give heed to the fauna of the Red Sea and of the Western Indian Ocean, from where, as in the case of the Parrot fishes, many early types were described. Failure to do this has caused species from the Pacific described as new, later to be proved identical with those long known from the Red Sea or the Indian Ocean. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1961
- Authors: Smith, J.L.B. (James Leonard Brierley), 1897-1968
- Date: 1961
- Subjects: Cardinalfishes , Fishes -- Classification , Fishes -- Indian Ocean , Fishes -- Red Sea
- Language: English
- Type: Text
- Identifier: vital:14985 , http://hdl.handle.net/10962/d1018952 , Ichthyological Bulletin; No. 22
- Description: Fishes of the family Apogonidae of the Western Indian Ocean and the Red Sea. Small and relatively feeble as most of these fishes are many cover an astonishing range. Some are found over truly vast areas of the Indo-Pacific, ranging from Southern Africa to the mid-Pacific. As a result, workers on even mid-Pacific Apogonidae need to give heed to the fauna of the Red Sea and of the Western Indian Ocean, from where, as in the case of the Parrot fishes, many early types were described. Failure to do this has caused species from the Pacific described as new, later to be proved identical with those long known from the Red Sea or the Indian Ocean. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1961
Fishes of the family Xenopoclinidae
- Smith, J.L.B. (James Leonard Brierley), 1897-1968
- Authors: Smith, J.L.B. (James Leonard Brierley), 1897-1968
- Date: 1961
- Subjects: Clinidae
- Language: English
- Type: Text
- Identifier: vital:14982 , http://hdl.handle.net/10962/d1018781 , Ichthyological Bulletin; No. 20
- Description: As is w ell know n, there is a sharp line of distinction at the Cape between the warmer waters of the east and south coast of Africa, and the cool seas of the western Cape areas, with corresponding cleavage in the marine fauna. It was in this cooler area that a specimen of the first member of this group, Xenopoclinus kochi Smith, 1947, was discovered, and at that time it was given subfamily rank in the Clinidae. Until recently only the holotype was known, but now not only have further specimens been secured, but also a second species in this genus, and even more striking is the discovery of a second genus and a third species from the same locality. These forms all show clear relationship with the Blennioid fishes, but despite the numerous families in that order, I cannot find any among them that are so clearly related to the fishes described here, as to be able to assign this small group with certainty to anyone. The peculiar characters appear to merit full family rank, as is given here. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1961
- Authors: Smith, J.L.B. (James Leonard Brierley), 1897-1968
- Date: 1961
- Subjects: Clinidae
- Language: English
- Type: Text
- Identifier: vital:14982 , http://hdl.handle.net/10962/d1018781 , Ichthyological Bulletin; No. 20
- Description: As is w ell know n, there is a sharp line of distinction at the Cape between the warmer waters of the east and south coast of Africa, and the cool seas of the western Cape areas, with corresponding cleavage in the marine fauna. It was in this cooler area that a specimen of the first member of this group, Xenopoclinus kochi Smith, 1947, was discovered, and at that time it was given subfamily rank in the Clinidae. Until recently only the holotype was known, but now not only have further specimens been secured, but also a second species in this genus, and even more striking is the discovery of a second genus and a third species from the same locality. These forms all show clear relationship with the Blennioid fishes, but despite the numerous families in that order, I cannot find any among them that are so clearly related to the fishes described here, as to be able to assign this small group with certainty to anyone. The peculiar characters appear to merit full family rank, as is given here. , Rhodes University Libraries (Digitisation)
- Full Text:
- Date Issued: 1961
Frogs
- Performer not specified, Composer not specified, Tracey, Hugh
- Authors: Performer not specified , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Country not specified city not specified f-
- Language: Language not specified
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/344996 , vital:63220 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP3925-3
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
- Authors: Performer not specified , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Country not specified city not specified f-
- Language: Language not specified
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/344996 , vital:63220 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP3925-3
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
Frogs
- Performer not specified, Composer not specified, Tracey, Hugh
- Authors: Performer not specified , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Country not specified city not specified f-
- Language: Language not specified
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/344875 , vital:63190 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP3923-3
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
- Authors: Performer not specified , Composer not specified , Tracey, Hugh
- Date: 1961
- Subjects: Folk Music , Field recordings , Africa, Sub-Saharan , Africa Country not specified city not specified f-
- Language: Language not specified
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/344875 , vital:63190 , International Library of African Music, Rhodes University, Makhanda, South Africa , Hugh Tracey Commercial Records, Rhodes University, Makhanda, South Africa , TP3923-3
- Description: Indigenous music
- Full Text: false
- Date Issued: 1961
Gold fineness in hydrothermal ores : an investigation into the distribution of gold and silver in Southern Rhodesian gold ores
- Authors: Eales, Hugh V
- Date: 1961
- Subjects: Hydrothermal deposits -- Zimbabwe , Gold ores -- Zimbabwe , Silver ores -- Zimbabwe , Silver mines and mining -- Zimbabwe
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5077 , http://hdl.handle.net/10962/d1014887
- Description: This investigation is concerned with primary variations in the silver content of gold which occurs in hydrothermal deposits, particularly those of hypothermal character which are found in Basement rocks in Southern Rhodesia. The nature of the gold produced by a number of different mines has been studied by reference to production data, and microscope techniques as well as gold and silver assays have been used to determine and to explain the variations in gold fineness. The literature does not contain a great deal of information which is relevant to this topic, but an attempt has been made here to summarize the more important contributions by different writers. From this it emerges that the interpretations given by different investigators are in conflict and that paradoxes may arise when efforts are made to explain observed variations in fineness in terms of certain generalizations which have become entrenched in the literaure. In particular, it is shown that falling temperature alone cannot account for the occurrence of silver-rich gold in certain deposits. The Gwanda district of Southern Rhodesia has been selected as a typical gold belt, and the variation in fineness in 150 producers is described. The deposits are hypothermal in character, and the average fineness of the gold is high but variable, but in a small proportion the fineness is low. It is shown that the nature of the host rock and the distance of a deposit from the granite contact appear to have no influence on the fineness of the gold and that there is no zonal arrangement of fineness values. There is a suggestion that diversity of mineral species in any particular area may be accompanied by rather wide fluctuations in the gold fineness. The variations of fineness in eight typical Southern Rhodesian deposits are studied in detail, by analysis of production data, by assaying specimens of the ore and by the examination of polished specimens of gold-bearing ore. Briefer reference is made to two other deposits in the territory, and to deposits in other countries which appear to bear out the conclusions reached in this section. It emerges that there are two factors which can commonly be correlated with variations in fineness. The first of these is the grade of the ore: high-grade ore generally contains purer gold than low-grade ore. Secondly, the textural evidence indicates that gold which separates relatively early in the paragenesis contains more silver than that which is deposited in the final stages of metallization. A general survey which draws on the literature as well as on the writer's examinations of deposits in the territory indicates that, in general, gold which is associated with late-stage minerals such as tellurides, antimony, bismuth and bismuthinite is silver-poor. Gold associated with galena may be either silver-rich or silver-poor, whereas gold which is of the same age as chalcopyrite or sphalerite is very frequently rich in silver. The difficulty which is encountered in establishing the age of gold which is intimately associated with pyrite and arsenopyrite renders uncertain the correlation between fineness and age of gold in these latter cases. There are, however, indications that gold which is truly contemporaneous with either pyrite or arsenopyrite is silver-rich. In the discussion, the objections to the common practice of singling out temperature as the most potent factor controlling gold fineness are listed. Chief amongst these objections is the fact that gold does not in all deposits increase in fineness with increasing depth: examples are quoted where fineness was found to decrease as deeper levels of the ore body were exploited. It is shown that there is no consistent relationship between the size of gold grains and their silver content. It is the writer's conclusion that in hydrothermal deposits in this territory the high fineness of the gold is due to increasing solubility of silver in the ore fluids in the late states, and that where hydrothermal deposits are characterized by gold with low average fineness, an unusually large proportion of the gold has been deposited early in the paragenotic sequence. In the majority of hypothermal deposits, however, the bulk of tho gold separates late in the sequence and the fineness is accordingly high. It is believed that the relationship which exists between fineness and tenor in many deposits is due to protracted crystallization of gold in those portions of the ore body which remained permeable to the latest stages. These portions of the ore body, which represent either valuable ore shoots or ore shoots in miniature, are likely to contain gold of variable character, but the average silver content will be low because a large proportion of the gold is "late" gold. The factors which might cause epithermal gold to have a lower fineness than mesothermal or hypothermal gold are briefly discussed. Some possible applications of this study are indicated in the final chapter. It is claimed that records of gold fineness might constitute a valuable addition to mill records. Tentative suggestions are made regarding a method whereby the approaching exhaustion of a deposit might in some cases be predicted. With regard to the origin of the gold in the Witwatersrand sediments, it is pointed out that the modified placer hypothesis is not fully equipped to explain certain of the variations in the composition of the gold.
- Full Text:
- Date Issued: 1961
- Authors: Eales, Hugh V
- Date: 1961
- Subjects: Hydrothermal deposits -- Zimbabwe , Gold ores -- Zimbabwe , Silver ores -- Zimbabwe , Silver mines and mining -- Zimbabwe
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5077 , http://hdl.handle.net/10962/d1014887
- Description: This investigation is concerned with primary variations in the silver content of gold which occurs in hydrothermal deposits, particularly those of hypothermal character which are found in Basement rocks in Southern Rhodesia. The nature of the gold produced by a number of different mines has been studied by reference to production data, and microscope techniques as well as gold and silver assays have been used to determine and to explain the variations in gold fineness. The literature does not contain a great deal of information which is relevant to this topic, but an attempt has been made here to summarize the more important contributions by different writers. From this it emerges that the interpretations given by different investigators are in conflict and that paradoxes may arise when efforts are made to explain observed variations in fineness in terms of certain generalizations which have become entrenched in the literaure. In particular, it is shown that falling temperature alone cannot account for the occurrence of silver-rich gold in certain deposits. The Gwanda district of Southern Rhodesia has been selected as a typical gold belt, and the variation in fineness in 150 producers is described. The deposits are hypothermal in character, and the average fineness of the gold is high but variable, but in a small proportion the fineness is low. It is shown that the nature of the host rock and the distance of a deposit from the granite contact appear to have no influence on the fineness of the gold and that there is no zonal arrangement of fineness values. There is a suggestion that diversity of mineral species in any particular area may be accompanied by rather wide fluctuations in the gold fineness. The variations of fineness in eight typical Southern Rhodesian deposits are studied in detail, by analysis of production data, by assaying specimens of the ore and by the examination of polished specimens of gold-bearing ore. Briefer reference is made to two other deposits in the territory, and to deposits in other countries which appear to bear out the conclusions reached in this section. It emerges that there are two factors which can commonly be correlated with variations in fineness. The first of these is the grade of the ore: high-grade ore generally contains purer gold than low-grade ore. Secondly, the textural evidence indicates that gold which separates relatively early in the paragenesis contains more silver than that which is deposited in the final stages of metallization. A general survey which draws on the literature as well as on the writer's examinations of deposits in the territory indicates that, in general, gold which is associated with late-stage minerals such as tellurides, antimony, bismuth and bismuthinite is silver-poor. Gold associated with galena may be either silver-rich or silver-poor, whereas gold which is of the same age as chalcopyrite or sphalerite is very frequently rich in silver. The difficulty which is encountered in establishing the age of gold which is intimately associated with pyrite and arsenopyrite renders uncertain the correlation between fineness and age of gold in these latter cases. There are, however, indications that gold which is truly contemporaneous with either pyrite or arsenopyrite is silver-rich. In the discussion, the objections to the common practice of singling out temperature as the most potent factor controlling gold fineness are listed. Chief amongst these objections is the fact that gold does not in all deposits increase in fineness with increasing depth: examples are quoted where fineness was found to decrease as deeper levels of the ore body were exploited. It is shown that there is no consistent relationship between the size of gold grains and their silver content. It is the writer's conclusion that in hydrothermal deposits in this territory the high fineness of the gold is due to increasing solubility of silver in the ore fluids in the late states, and that where hydrothermal deposits are characterized by gold with low average fineness, an unusually large proportion of the gold has been deposited early in the paragenotic sequence. In the majority of hypothermal deposits, however, the bulk of tho gold separates late in the sequence and the fineness is accordingly high. It is believed that the relationship which exists between fineness and tenor in many deposits is due to protracted crystallization of gold in those portions of the ore body which remained permeable to the latest stages. These portions of the ore body, which represent either valuable ore shoots or ore shoots in miniature, are likely to contain gold of variable character, but the average silver content will be low because a large proportion of the gold is "late" gold. The factors which might cause epithermal gold to have a lower fineness than mesothermal or hypothermal gold are briefly discussed. Some possible applications of this study are indicated in the final chapter. It is claimed that records of gold fineness might constitute a valuable addition to mill records. Tentative suggestions are made regarding a method whereby the approaching exhaustion of a deposit might in some cases be predicted. With regard to the origin of the gold in the Witwatersrand sediments, it is pointed out that the modified placer hypothesis is not fully equipped to explain certain of the variations in the composition of the gold.
- Full Text:
- Date Issued: 1961
Gumbukumbu
- Tapera, Jege, Tracey, Andrew T N
- Authors: Tapera, Jege , Tracey, Andrew T N
- Date: 1961
- Subjects: Zezuru (African people) -- Music , Folk music -- Zimbabwe , Karimba music -- Zimbabwe , Songs, Shona -- Zimbabwe , Mbira music -- Zimbabwe , Sub-Saharan African music , Vocal music -- Zimbabwe , Africa Rhodesia Bulawayo f-rh
- Language: Shona
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/58246 , vital:27109 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC001b-04
- Description: Traditional Zezuru song accompanied by karimba.
- Full Text: false
- Date Issued: 1961
- Authors: Tapera, Jege , Tracey, Andrew T N
- Date: 1961
- Subjects: Zezuru (African people) -- Music , Folk music -- Zimbabwe , Karimba music -- Zimbabwe , Songs, Shona -- Zimbabwe , Mbira music -- Zimbabwe , Sub-Saharan African music , Vocal music -- Zimbabwe , Africa Rhodesia Bulawayo f-rh
- Language: Shona
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/58246 , vital:27109 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC001b-04
- Description: Traditional Zezuru song accompanied by karimba.
- Full Text: false
- Date Issued: 1961
Investigation of the formation of complexes between selected organic compounds and the chlorides and sulphates of chromium
- Authors: Ellis, Melville John
- Date: 1961
- Subjects: Organic compounds , Chromium compounds , Chlorides , Sulfates
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4466 , http://hdl.handle.net/10962/d1011744 , Organic compounds , Chromium compounds , Chlorides , Sulfates
- Description: Some properties of soluble chromium complexions containing coordinated aliphatic acids have been studied. The work falls naturally into two sections. In the first, the coordination of a series of ⊄, β and⊁amino acids by chromium chloride has been studied by physical methods. The tanning action of chromium chloride in the presence of these amino acids has also been studied. The absorption spectra of the complexes were similar to those reported previously for trivalent chromium solutions, having two pronounced maxima in the visible region. From the variations in these absorption maxima, it is suggested that the absorption maximum in the 580 m u region is influenced by coordination of the chromium with the ligand, while the maximum in the 420 m u region is also affected by the olation of the basic chromium salts. The spectrophotometric evidence indicates that raising the pH or the concentration of the ligand in the solution increases the amount of coordination, and further, that the tendency for coordination increases as the hydrocarbon chain separating the carboxyl and amino groups becomes longer. This suggests that tho stability of the complex is not dependent on chelate ring formation, but is influenced by the pK₁ value of the carboxyl group of the . ligand. Potentiometric titrations support the hypothesis that only the carboxyl group is coordinated, to an extent depending on its pK₁ value, since the curves have shown that the amino group is still free to titrate. Paper electrophoresis has shown that all the complexes prepared were cationic, indicating that the amino acids were coordinated as dipolar ions. The tanning action of the masked chromium solutions has confirmed the deductions made from the physical measurements. Increasing the amount of amino acid added to the solution lowered the chromium fixation and the hydrothermal stability of the leather, and further, that for solutions at the same pH containing the same amount of masking agent, tanning action was least for the ⊁ amino acid and greatest for the ⊄ amino acids. Comparison of the present data with the corresponding results obtained with chrome alum solutions showed that coordination of the amino acids was greater in the case of the chromium chloride solutions. The second section of the experimental work was an investigation of the coordination of substituted acetic and propionic acids by chromium chloride and chromium sulphate. Spectrophotometric and potentiometric methods were applied and the various solutions were also used in miniature tanning experiments. Certain difficulties were encountered in the preparation of some of the complexes, and it was not possible to carry the work to a point where conclusive results could be obtained. Nevertheless, the work reported suggests that chelate ring formation occurs in the coordination of hydroxy-carboxylic acids, resulting in exceptionally high stability of the complex. In the case of the other ligands, containing amino, chloro and bromo groups, as well as with acetic and propionic acids, the results suggest that coordination involves the carboxyl group only, and that the pY value of this group is an important factor determining the stability of the complexes.
- Full Text:
- Date Issued: 1961
- Authors: Ellis, Melville John
- Date: 1961
- Subjects: Organic compounds , Chromium compounds , Chlorides , Sulfates
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4466 , http://hdl.handle.net/10962/d1011744 , Organic compounds , Chromium compounds , Chlorides , Sulfates
- Description: Some properties of soluble chromium complexions containing coordinated aliphatic acids have been studied. The work falls naturally into two sections. In the first, the coordination of a series of ⊄, β and⊁amino acids by chromium chloride has been studied by physical methods. The tanning action of chromium chloride in the presence of these amino acids has also been studied. The absorption spectra of the complexes were similar to those reported previously for trivalent chromium solutions, having two pronounced maxima in the visible region. From the variations in these absorption maxima, it is suggested that the absorption maximum in the 580 m u region is influenced by coordination of the chromium with the ligand, while the maximum in the 420 m u region is also affected by the olation of the basic chromium salts. The spectrophotometric evidence indicates that raising the pH or the concentration of the ligand in the solution increases the amount of coordination, and further, that the tendency for coordination increases as the hydrocarbon chain separating the carboxyl and amino groups becomes longer. This suggests that tho stability of the complex is not dependent on chelate ring formation, but is influenced by the pK₁ value of the carboxyl group of the . ligand. Potentiometric titrations support the hypothesis that only the carboxyl group is coordinated, to an extent depending on its pK₁ value, since the curves have shown that the amino group is still free to titrate. Paper electrophoresis has shown that all the complexes prepared were cationic, indicating that the amino acids were coordinated as dipolar ions. The tanning action of the masked chromium solutions has confirmed the deductions made from the physical measurements. Increasing the amount of amino acid added to the solution lowered the chromium fixation and the hydrothermal stability of the leather, and further, that for solutions at the same pH containing the same amount of masking agent, tanning action was least for the ⊁ amino acid and greatest for the ⊄ amino acids. Comparison of the present data with the corresponding results obtained with chrome alum solutions showed that coordination of the amino acids was greater in the case of the chromium chloride solutions. The second section of the experimental work was an investigation of the coordination of substituted acetic and propionic acids by chromium chloride and chromium sulphate. Spectrophotometric and potentiometric methods were applied and the various solutions were also used in miniature tanning experiments. Certain difficulties were encountered in the preparation of some of the complexes, and it was not possible to carry the work to a point where conclusive results could be obtained. Nevertheless, the work reported suggests that chelate ring formation occurs in the coordination of hydroxy-carboxylic acids, resulting in exceptionally high stability of the complex. In the case of the other ligands, containing amino, chloro and bromo groups, as well as with acetic and propionic acids, the results suggest that coordination involves the carboxyl group only, and that the pY value of this group is an important factor determining the stability of the complexes.
- Full Text:
- Date Issued: 1961
John X. Merriman : the making of a South African statesman (1869-1878)
- Authors: Gruber, R F J
- Date: 1961
- Subjects: Merriman, John Xavier, 1841-1926 , Statesmen -- South Africa -- Biography , South Africa -- Politics and government -- 1836-1909
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2623 , http://hdl.handle.net/10962/d1015002
- Description: With the possible exception of Hofmeyr and Schreiner, there is no Cape statesman whose career raises more tantalising questions than that of John X. Merr1man. Last Prime Minister of the Cape Colony, doyen of Parliamentarians, brilliant orator, versatile administrator, veteran politician, his public life stretched across fifty-five years of south African History. He entered upon it before the grant of Responsible Government, the discovery of diamonds and gold, and the awakening. of Afrikaner Nationalism; he departed from it on the eve of the Statute of Westminster, the establishment of Iscor and the coming to power of Hertzog and Malan. His contemporaries looked upon him as a man of immense knowledge and olympian ability. In the eyes of many his position as leader of the largest and oldest settled community in South Africa, not to mention his role as heir to the Cape tradition, made him the natural choice as first Prime Minister of the Union he had helped to establish. He was not called to office. Barely seventy, in the full maturity of his years, he withdrew trom active political leadership in the country of his adoption. He is hardly remembered today. This thesis seeks to contribute something to an understanding of the man and an assessment of his qualities by a study of his formative years. It attempts both to reconstruct his personality and analyse the nature of his statesmanship - not only by an examination of the role he played in the years under review, but also by an assessment of the part he failed to play. For this purpose both the structure of Cape politics and the ramifications of the various problems that presented themselves have been explored in greater detail than might otherwise have been the case.
- Full Text:
- Date Issued: 1961
- Authors: Gruber, R F J
- Date: 1961
- Subjects: Merriman, John Xavier, 1841-1926 , Statesmen -- South Africa -- Biography , South Africa -- Politics and government -- 1836-1909
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2623 , http://hdl.handle.net/10962/d1015002
- Description: With the possible exception of Hofmeyr and Schreiner, there is no Cape statesman whose career raises more tantalising questions than that of John X. Merr1man. Last Prime Minister of the Cape Colony, doyen of Parliamentarians, brilliant orator, versatile administrator, veteran politician, his public life stretched across fifty-five years of south African History. He entered upon it before the grant of Responsible Government, the discovery of diamonds and gold, and the awakening. of Afrikaner Nationalism; he departed from it on the eve of the Statute of Westminster, the establishment of Iscor and the coming to power of Hertzog and Malan. His contemporaries looked upon him as a man of immense knowledge and olympian ability. In the eyes of many his position as leader of the largest and oldest settled community in South Africa, not to mention his role as heir to the Cape tradition, made him the natural choice as first Prime Minister of the Union he had helped to establish. He was not called to office. Barely seventy, in the full maturity of his years, he withdrew trom active political leadership in the country of his adoption. He is hardly remembered today. This thesis seeks to contribute something to an understanding of the man and an assessment of his qualities by a study of his formative years. It attempts both to reconstruct his personality and analyse the nature of his statesmanship - not only by an examination of the role he played in the years under review, but also by an assessment of the part he failed to play. For this purpose both the structure of Cape politics and the ramifications of the various problems that presented themselves have been explored in greater detail than might otherwise have been the case.
- Full Text:
- Date Issued: 1961
Kana ndoda
- Tapera, Jege, Tracey, Andrew T N
- Authors: Tapera, Jege , Tracey, Andrew T N
- Date: 1961
- Subjects: Zezuru (African people) -- Music , Folk music -- Zimbabwe , Karimba music -- Zimbabwe , Songs, Shona -- Zimbabwe , Mbira music -- Zimbabwe , Sub-Saharan African music , Africa Rhodesia Bulawayo f-rh
- Language: Shona
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/58138 , vital:27088 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC001a-07
- Description: raditional Zezuru song accompanied by karimba. English translation of title: 'When I want'.
- Full Text: false
- Date Issued: 1961
- Authors: Tapera, Jege , Tracey, Andrew T N
- Date: 1961
- Subjects: Zezuru (African people) -- Music , Folk music -- Zimbabwe , Karimba music -- Zimbabwe , Songs, Shona -- Zimbabwe , Mbira music -- Zimbabwe , Sub-Saharan African music , Africa Rhodesia Bulawayo f-rh
- Language: Shona
- Type: sound recordings , field recordings , sound recording-musical
- Identifier: http://hdl.handle.net/10962/58138 , vital:27088 , International Library of African Music, Rhodes University, Grahamstown, South Africa , ATC001a-07
- Description: raditional Zezuru song accompanied by karimba. English translation of title: 'When I want'.
- Full Text: false
- Date Issued: 1961
Kilnerton Training Institution - Graduation tea party, 1961
- Date: 1961
- Subjects: Kilnerton Training Institution -- Buildings -- Photographs Kilnerton Training Institution -- History -- Photographs Pretoria -- History -- Photographs Weaving Park, Pretoria -- History
- Type: Image
- Identifier: http://hdl.handle.net/10962/10788 , vital:21628 , PIC/M 5782
- Description: The Kilnerton Training Institution, affiliated to the Methodist Church of Southern Africa, was established in 1886 in the small suburb of Weaving Park, Pretoria. The Institution was named after Rev. John Kilner, who encouraged the formation of an indigenous clergy in South Africa. The mission of the Institution was to provide seminary education to locals in preparation for ordination. In and above providing seminary education, Kilnerton also served as a primary and secondary school for children in the local community. The Institution is known for some of its illustrious past students, including Dikgang Moseneke (Deputy Chief Justice), Sefako Makgatho, Miriam Makeba, Lillian Ngoyi and Thomas Masekela. , This image is held at the Cory Library for Humanities Research at Rhodes University. For further information contact cory@ru.ac.za. The digitisation of this image was made possible through a generous grant received from the Andrew W. Mellon Foundation 2014-2017.
- Full Text: false
- Date Issued: 1961
- Date: 1961
- Subjects: Kilnerton Training Institution -- Buildings -- Photographs Kilnerton Training Institution -- History -- Photographs Pretoria -- History -- Photographs Weaving Park, Pretoria -- History
- Type: Image
- Identifier: http://hdl.handle.net/10962/10788 , vital:21628 , PIC/M 5782
- Description: The Kilnerton Training Institution, affiliated to the Methodist Church of Southern Africa, was established in 1886 in the small suburb of Weaving Park, Pretoria. The Institution was named after Rev. John Kilner, who encouraged the formation of an indigenous clergy in South Africa. The mission of the Institution was to provide seminary education to locals in preparation for ordination. In and above providing seminary education, Kilnerton also served as a primary and secondary school for children in the local community. The Institution is known for some of its illustrious past students, including Dikgang Moseneke (Deputy Chief Justice), Sefako Makgatho, Miriam Makeba, Lillian Ngoyi and Thomas Masekela. , This image is held at the Cory Library for Humanities Research at Rhodes University. For further information contact cory@ru.ac.za. The digitisation of this image was made possible through a generous grant received from the Andrew W. Mellon Foundation 2014-2017.
- Full Text: false
- Date Issued: 1961