A critical study of assessments made during a trial interview situation
- Authors: Pons, A L
- Date: 1951
- Subjects: Interviewing
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3226 , http://hdl.handle.net/10962/d1013040
- Description: At the end of 1948 the National Institute for Personnel Research (N.I.P.R.) organised a series of testing procedures for the selection of administrative trainees for a large industrial organisation. The fruitful results obtained by the British War Office and the Civil Service selection Boards in the application of approved techniques for similar purposes supplied the basis on which the battery of tests was constructed. While having regard for this established approach as well as the controlling influence imposed by the stipulations of the contract, the N.I.P.R. was able to devise a battery which provided scope for its specific interest in research. Intro., p. 1.
- Full Text:
- Authors: Pons, A L
- Date: 1951
- Subjects: Interviewing
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3226 , http://hdl.handle.net/10962/d1013040
- Description: At the end of 1948 the National Institute for Personnel Research (N.I.P.R.) organised a series of testing procedures for the selection of administrative trainees for a large industrial organisation. The fruitful results obtained by the British War Office and the Civil Service selection Boards in the application of approved techniques for similar purposes supplied the basis on which the battery of tests was constructed. While having regard for this established approach as well as the controlling influence imposed by the stipulations of the contract, the N.I.P.R. was able to devise a battery which provided scope for its specific interest in research. Intro., p. 1.
- Full Text:
A socio-economic study of East London, Cape Province, with special reference to the non-European peoples
- Authors: Bettison, D G
- Date: 1951
- Subjects: East London (South Africa) -- Social conditions , East London (South Africa) -- Economic conditions , Rural-urban migration -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3387 , http://hdl.handle.net/10962/d1013496
- Description: From Forward: The development of gold mines in the Orange Free State is likely to be to modern East London what Kaffir Wars were to old East London. "The Fighting Port", as it is commonly called, is the nearest harbour to these mines and is linked by good rail, road and air facilities. A wide variety of industry is already established. Development is likely to be rapid. At present the City contains over 80,000 persons, and with the addition of peri-urban suburbs has doubled its population in just over fifteen years. In the past is has claimed to be the healthiest holiday resort in the Union. This year a City-wide campaign has been organised to fight tuberculosis, as the City's statistics indicate that it has one of the highest rates of anywhere in the world. Within twelve years two government sided commissions of enquiry have sat in the City and reported on the administration and living conditions of the city's African populaton. Extremely strong adjectives have been used to describe, and drastic recommendations made to improve the socio-economic and general conditions of the African people. Under the holiday atmosphere of the City lies a very serious, complex, and potentially dangerous human problem.
- Full Text:
- Authors: Bettison, D G
- Date: 1951
- Subjects: East London (South Africa) -- Social conditions , East London (South Africa) -- Economic conditions , Rural-urban migration -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3387 , http://hdl.handle.net/10962/d1013496
- Description: From Forward: The development of gold mines in the Orange Free State is likely to be to modern East London what Kaffir Wars were to old East London. "The Fighting Port", as it is commonly called, is the nearest harbour to these mines and is linked by good rail, road and air facilities. A wide variety of industry is already established. Development is likely to be rapid. At present the City contains over 80,000 persons, and with the addition of peri-urban suburbs has doubled its population in just over fifteen years. In the past is has claimed to be the healthiest holiday resort in the Union. This year a City-wide campaign has been organised to fight tuberculosis, as the City's statistics indicate that it has one of the highest rates of anywhere in the world. Within twelve years two government sided commissions of enquiry have sat in the City and reported on the administration and living conditions of the city's African populaton. Extremely strong adjectives have been used to describe, and drastic recommendations made to improve the socio-economic and general conditions of the African people. Under the holiday atmosphere of the City lies a very serious, complex, and potentially dangerous human problem.
- Full Text:
East London and its geographical setting
- Authors: Moult, Frank Leslie
- Date: 1951
- Subjects: East London (South Africa) -- Geography
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:4874 , http://hdl.handle.net/10962/d1012908
- Description: Along the South African coast between Cape Town and Durban, a distance of 822 miles, are the two major ports, Port Elizabeth and East London. These two ports, rivals in some ways, have histories that are closely linked. Their harbours have been built at two of the most favourable spots along a coastline poorly endowed with natural harbours. East London, the fourth harbour of the Union of South Africa, is the only river port of any consequence, and had to win the mechanical fight against nature and the fight against prejudice that contended that her position was too close to a troublesome frontier. After a hundred years of growth, East London is a mature town, with the residential and industrial areas clearly defined. Her expansion will be along the lines of planned zoning. (2) Her population in 1950 was 910,195 of which 43,195 were European and 39,698 Native. Besides being a port, East London is a prominent holiday resort and, of recent years, is developing as an industrial town. A striking feature is the clean aspect of the town. Those two "miracles" of South Africa, the discovery of diamonds and the discovery of gold, stimulated the growth of East London; especially the discovery of diamonds since Kimberley was about 450 miles from this, its nearest harbour. But the river mouth at East London had very little natural advantage over the other river mouths along the coast. There was at the Buffalo Mouth no outstanding, decisive merit. In many matters, such as the railway, the bridge, the water supply, there was doubt, uncertainty and bickering, with subsequent decisions to shelve the latter or make use of a temporary expedient, because there were many mediocre alternatives but none which was supremely suitable. In 1852, Bishop Gray wrote, "East London ... .has as few natural advantages as any place I have seen claiming to be a port. I could have walked across the river without getting wet above the knee." Intro., p. i-ii.
- Full Text:
- Authors: Moult, Frank Leslie
- Date: 1951
- Subjects: East London (South Africa) -- Geography
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:4874 , http://hdl.handle.net/10962/d1012908
- Description: Along the South African coast between Cape Town and Durban, a distance of 822 miles, are the two major ports, Port Elizabeth and East London. These two ports, rivals in some ways, have histories that are closely linked. Their harbours have been built at two of the most favourable spots along a coastline poorly endowed with natural harbours. East London, the fourth harbour of the Union of South Africa, is the only river port of any consequence, and had to win the mechanical fight against nature and the fight against prejudice that contended that her position was too close to a troublesome frontier. After a hundred years of growth, East London is a mature town, with the residential and industrial areas clearly defined. Her expansion will be along the lines of planned zoning. (2) Her population in 1950 was 910,195 of which 43,195 were European and 39,698 Native. Besides being a port, East London is a prominent holiday resort and, of recent years, is developing as an industrial town. A striking feature is the clean aspect of the town. Those two "miracles" of South Africa, the discovery of diamonds and the discovery of gold, stimulated the growth of East London; especially the discovery of diamonds since Kimberley was about 450 miles from this, its nearest harbour. But the river mouth at East London had very little natural advantage over the other river mouths along the coast. There was at the Buffalo Mouth no outstanding, decisive merit. In many matters, such as the railway, the bridge, the water supply, there was doubt, uncertainty and bickering, with subsequent decisions to shelve the latter or make use of a temporary expedient, because there were many mediocre alternatives but none which was supremely suitable. In 1852, Bishop Gray wrote, "East London ... .has as few natural advantages as any place I have seen claiming to be a port. I could have walked across the river without getting wet above the knee." Intro., p. i-ii.
- Full Text:
Rhodes University Graduation Ceremony 1951
- Authors: Rhodes University
- Date: 1951
- Language: English
- Type: text
- Identifier: vital:8085 , http://hdl.handle.net/10962/d1004395
- Description: Rhodes University Inaugural Celebrations Programme. Special Graduation Ceremony, Grahamstown, Friday, 9th March, 1951. , Installation as Chancellor of the University of Dr. B. F. J. Schonland, C.B.E., LL.D., D.Sc., F.R.S., and Honorary Graduation Ceremony in the City Hall, Grahamstown, Thursday, October 25th, 1951, 11a.m.
- Full Text:
- Authors: Rhodes University
- Date: 1951
- Language: English
- Type: text
- Identifier: vital:8085 , http://hdl.handle.net/10962/d1004395
- Description: Rhodes University Inaugural Celebrations Programme. Special Graduation Ceremony, Grahamstown, Friday, 9th March, 1951. , Installation as Chancellor of the University of Dr. B. F. J. Schonland, C.B.E., LL.D., D.Sc., F.R.S., and Honorary Graduation Ceremony in the City Hall, Grahamstown, Thursday, October 25th, 1951, 11a.m.
- Full Text:
Ficus sansibarica - Wild Fig
- Authors: Skead, C J (Cuthbert John)
- Date: 1951-01
- Subjects: Ficus sansibarica -- South Africa -- Photographs , Trees -- South Africa -- Photographs
- Language: English
- Type: mixed material , photographs , landscape photographs
- Identifier: http://hdl.handle.net/10962/121712 , vital:35134
- Description: Caption "Shade for the farm yard. Two lovely spreading umbrellas beside a farm house in the Peddie district. Jan. 1951."
- Full Text: false
- Authors: Skead, C J (Cuthbert John)
- Date: 1951-01
- Subjects: Ficus sansibarica -- South Africa -- Photographs , Trees -- South Africa -- Photographs
- Language: English
- Type: mixed material , photographs , landscape photographs
- Identifier: http://hdl.handle.net/10962/121712 , vital:35134
- Description: Caption "Shade for the farm yard. Two lovely spreading umbrellas beside a farm house in the Peddie district. Jan. 1951."
- Full Text: false
A study of the E region of the ionosphere
- Authors: Barnard, A J
- Date: 1950
- Subjects: Ionosphere -- Research
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5549 , http://hdl.handle.net/10962/d1013464
- Description: After a brief historical introduction, the apparatus used in the investigation of the ionosphere in Grahamstown, is described with special reference to the recording equipment, which consists essentially of a camera focussed on the screen of a C.R.O. with z-axis deflection. The equations of the magneto-ionic theory are quoted. The basic formulae of the theories of layer formation in an isothermal (Chapman's),and linear temperature gradient (Gledhill and Szendrei) atmosphere are also quoted.
- Full Text:
- Authors: Barnard, A J
- Date: 1950
- Subjects: Ionosphere -- Research
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5549 , http://hdl.handle.net/10962/d1013464
- Description: After a brief historical introduction, the apparatus used in the investigation of the ionosphere in Grahamstown, is described with special reference to the recording equipment, which consists essentially of a camera focussed on the screen of a C.R.O. with z-axis deflection. The equations of the magneto-ionic theory are quoted. The basic formulae of the theories of layer formation in an isothermal (Chapman's),and linear temperature gradient (Gledhill and Szendrei) atmosphere are also quoted.
- Full Text:
A study on white leather tannage
- Authors: Williams-Wynn, D A
- Date: 1950
- Subjects: Uncatalogued
- Language: English
- Type: Diploma theses , text
- Identifier: http://hdl.handle.net/10962/193713 , vital:45389
- Description: As has been noted in the previous section little or no complex formation occurs with either formate or acetate except possibly above pH 9*0 or so. These anions do not stabilise the aluminium solutions to precipitation - they may* however, be of value in controlling pH, as solutions of these salts buffer strongly in the region pH 4 to 5. The other salts, lactate, tartrate and citrate all show tendencies to complex formation though the degree to which this occurs varies with the anion. The complexes formed by lactate at high pH must be very unstable because on the addition of acid the pH corresponds to the calculated blank. Below pH 9.0 however, the curves deviate quite considerably showing that more acid must be added to reach a certain pH value than is required by the blank. This means complex formation has occurred with loss of -COGH groups. In this system too, buffering is apparent. The same is true of tartrate but this salt is not as efficient a buffering agent. This is probably due to the fact that the excess tartrate is not available as a buffer as it is precipitated as the acid salt which is only sparingly soluble. Citrate on the other hand must form very stable complexes, the effect of which is apparent at even very high pH values. In other words, addition of strong acid liberates free -GOGH groups which are immediately incorporated in the complex. This evidently does not occur with lactate or tartrate until lower pH values are reached. The ratio of lactate and citrate to aluminium appears to have some influence on the degree of masking as greater complex formation is found to occur at the higher ratio levels. Tartrate on the other hand apparently has a fixed complex forming capacity between 1 and 4 mols/mol aluminium, since the same deviation from the blank was observed irrespective of which ratio of the masking agent to aluminium, was employed. However, at ratios of less than 1 mol tartrate/mol aluminium, deviations from the blank were reduced and less stabilisation occurs as evidenced by the formation of precipitates containing aluminium under these conditions. In view of these facts it may be suggested that 1 mol tartrate combines with 1 mol aluminium to form a complex containing equimolar proportions of aluminium and tartrate. The effect of boiling apart from one or two exceptions always has the same effect, i.e. a shift to the acid side of the curve. Free acid must have been liberated which is an indication that olation might have occurred. In the lactate and citrate series dilution appears to reduce the complex forming capacity of these ions but tartrate is unaffected. Thus it would appear that the tartrate complex is more stable than those formed by lactate. Citrate stabilises aluminium solutions with fewer equivalents than tartrate, but the complex does not contain a constant ratio of masking agent to aluminium further quantities of tartrate cannot enter the complex even in the presence of large excess of the anion probably due to the effect of steric hindrance. , Thesis (Dip) -- Leather Industries Research Institute, 1950
- Full Text:
- Authors: Williams-Wynn, D A
- Date: 1950
- Subjects: Uncatalogued
- Language: English
- Type: Diploma theses , text
- Identifier: http://hdl.handle.net/10962/193713 , vital:45389
- Description: As has been noted in the previous section little or no complex formation occurs with either formate or acetate except possibly above pH 9*0 or so. These anions do not stabilise the aluminium solutions to precipitation - they may* however, be of value in controlling pH, as solutions of these salts buffer strongly in the region pH 4 to 5. The other salts, lactate, tartrate and citrate all show tendencies to complex formation though the degree to which this occurs varies with the anion. The complexes formed by lactate at high pH must be very unstable because on the addition of acid the pH corresponds to the calculated blank. Below pH 9.0 however, the curves deviate quite considerably showing that more acid must be added to reach a certain pH value than is required by the blank. This means complex formation has occurred with loss of -COGH groups. In this system too, buffering is apparent. The same is true of tartrate but this salt is not as efficient a buffering agent. This is probably due to the fact that the excess tartrate is not available as a buffer as it is precipitated as the acid salt which is only sparingly soluble. Citrate on the other hand must form very stable complexes, the effect of which is apparent at even very high pH values. In other words, addition of strong acid liberates free -GOGH groups which are immediately incorporated in the complex. This evidently does not occur with lactate or tartrate until lower pH values are reached. The ratio of lactate and citrate to aluminium appears to have some influence on the degree of masking as greater complex formation is found to occur at the higher ratio levels. Tartrate on the other hand apparently has a fixed complex forming capacity between 1 and 4 mols/mol aluminium, since the same deviation from the blank was observed irrespective of which ratio of the masking agent to aluminium, was employed. However, at ratios of less than 1 mol tartrate/mol aluminium, deviations from the blank were reduced and less stabilisation occurs as evidenced by the formation of precipitates containing aluminium under these conditions. In view of these facts it may be suggested that 1 mol tartrate combines with 1 mol aluminium to form a complex containing equimolar proportions of aluminium and tartrate. The effect of boiling apart from one or two exceptions always has the same effect, i.e. a shift to the acid side of the curve. Free acid must have been liberated which is an indication that olation might have occurred. In the lactate and citrate series dilution appears to reduce the complex forming capacity of these ions but tartrate is unaffected. Thus it would appear that the tartrate complex is more stable than those formed by lactate. Citrate stabilises aluminium solutions with fewer equivalents than tartrate, but the complex does not contain a constant ratio of masking agent to aluminium further quantities of tartrate cannot enter the complex even in the presence of large excess of the anion probably due to the effect of steric hindrance. , Thesis (Dip) -- Leather Industries Research Institute, 1950
- Full Text:
An investigation of certain complex ions of trivalent chromium by spectrophotometric and other physical methods
- Authors: Burley, Ralph Walter
- Date: 1950
- Subjects: Chromium
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4521 , http://hdl.handle.net/10962/d1014675
- Description: Although chromium coordination compounds are of considerable technological importance, they have been subjected to few thorough investigations since Werner's original experlments, in spite of the fact that we now possess a number of accurate physical methods, not available in Werner's time for the study of coordination complexes, The object of the work described in this thesis was to obtain further information on the chemistry of complex chromium(III) ions with special reference to the dioxalato-diaquochromiate system, [Cr(C₂0₄)₂(H₂0)₂]. For this purpose; spectrophotometric and potentlometrlc measurements were combined to yield information on a number of topics, The spectrophotometric investigations consisted in measuring the absorption spectra of the potassium salts of the complexes under consideration and in observing the changes in light absorption which occur during their formatlon and decomposition. The instrument used was a Beckmann Quartz Spectrophotometer model du. More than than twelve new absorption spectra were measured in this work and in conjunction with the spectra of other chromium and cobalt complexes reported by earlier workers, these are used to review the position of spectrophotometry as a method of investigating chromium complexes. The reasons for the shapes of the absorption spectra are discussed and it is concluded that spectrophotometry is useful for observing the progress of reactions involving complex ions and for analysing solutions, but that more fundamental data cannot be expected from the absorption curves.
- Full Text:
- Authors: Burley, Ralph Walter
- Date: 1950
- Subjects: Chromium
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4521 , http://hdl.handle.net/10962/d1014675
- Description: Although chromium coordination compounds are of considerable technological importance, they have been subjected to few thorough investigations since Werner's original experlments, in spite of the fact that we now possess a number of accurate physical methods, not available in Werner's time for the study of coordination complexes, The object of the work described in this thesis was to obtain further information on the chemistry of complex chromium(III) ions with special reference to the dioxalato-diaquochromiate system, [Cr(C₂0₄)₂(H₂0)₂]. For this purpose; spectrophotometric and potentlometrlc measurements were combined to yield information on a number of topics, The spectrophotometric investigations consisted in measuring the absorption spectra of the potassium salts of the complexes under consideration and in observing the changes in light absorption which occur during their formatlon and decomposition. The instrument used was a Beckmann Quartz Spectrophotometer model du. More than than twelve new absorption spectra were measured in this work and in conjunction with the spectra of other chromium and cobalt complexes reported by earlier workers, these are used to review the position of spectrophotometry as a method of investigating chromium complexes. The reasons for the shapes of the absorption spectra are discussed and it is concluded that spectrophotometry is useful for observing the progress of reactions involving complex ions and for analysing solutions, but that more fundamental data cannot be expected from the absorption curves.
- Full Text:
Phoenix reclinata - Palm
- Authors: Skead, C J (Cuthbert John)
- Date: 1950
- Subjects: Phoenix reclinata -- South Africa -- Photographs , Trees -- South Africa -- Photographs
- Language: English
- Type: mixed material , photographs , landscape photographs
- Identifier: http://hdl.handle.net/10962/122679 , vital:35318
- Description: Caption "Phoenix reclinata palm stripped of its leaves by nesting Spotted-backed Weaver-bird. Kwelera R., East London. 1950."
- Full Text: false
- Authors: Skead, C J (Cuthbert John)
- Date: 1950
- Subjects: Phoenix reclinata -- South Africa -- Photographs , Trees -- South Africa -- Photographs
- Language: English
- Type: mixed material , photographs , landscape photographs
- Identifier: http://hdl.handle.net/10962/122679 , vital:35318
- Description: Caption "Phoenix reclinata palm stripped of its leaves by nesting Spotted-backed Weaver-bird. Kwelera R., East London. 1950."
- Full Text: false
Phoenix reclinata palms
- Authors: Skead, C J (Cuthbert John)
- Date: 1950
- Subjects: Phoenix palms -- South Africa -- Photographs
- Language: English
- Type: mixed material , photographs , landscape photographs
- Identifier: http://hdl.handle.net/10962/75614 , vital:30441
- Description: Caption: "Phoenix reclinata palm stripped of its leaves by nesting spotted-backed weaver birds. Kwelegha River, East London. 1950."
- Full Text: false
- Authors: Skead, C J (Cuthbert John)
- Date: 1950
- Subjects: Phoenix palms -- South Africa -- Photographs
- Language: English
- Type: mixed material , photographs , landscape photographs
- Identifier: http://hdl.handle.net/10962/75614 , vital:30441
- Description: Caption: "Phoenix reclinata palm stripped of its leaves by nesting spotted-backed weaver birds. Kwelegha River, East London. 1950."
- Full Text: false
Rhodes University College Graduation Ceremony 1950
- Rhodes University College, University of South Africa
- Authors: Rhodes University College , University of South Africa
- Date: 1950
- Language: English
- Type: text
- Identifier: vital:8084 , http://hdl.handle.net/10962/d1004394
- Description: Special Graduation Ceremony, Grahamstown, Saturday, 29th April, 1950
- Full Text:
- Authors: Rhodes University College , University of South Africa
- Date: 1950
- Language: English
- Type: text
- Identifier: vital:8084 , http://hdl.handle.net/10962/d1004394
- Description: Special Graduation Ceremony, Grahamstown, Saturday, 29th April, 1950
- Full Text:
Studies in the plant ecology of Fern Kloof near Grahamstown
- Authors: Seagrief, S C
- Date: 1950
- Subjects: Plant communities -- South Africa -- Eastern Cape , Plant ecology -- South Africa -- Eastern Cape , Plants -- South Africa -- Eastern Cape , Forest ecology -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4267 , http://hdl.handle.net/10962/d1014299
- Description: The area studied at Fern Kloof, near Grahamstown, consists of a strip of vegetation approximately 260 yds. long and 50 yds. wide, in which there are two communities: 1) indigenous forest 2) exotic Pine forest (which has only one tree species Pinus pinaster). Throughout the thesis this species is referred to as the pine. The object of the investigation has been to determine whether these communities are natural or not. This has involved a study of the floristic composition, the life forms and the structure of the plant communities. In addition, various soil and environmental factors have been studied.
- Full Text:
- Authors: Seagrief, S C
- Date: 1950
- Subjects: Plant communities -- South Africa -- Eastern Cape , Plant ecology -- South Africa -- Eastern Cape , Plants -- South Africa -- Eastern Cape , Forest ecology -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4267 , http://hdl.handle.net/10962/d1014299
- Description: The area studied at Fern Kloof, near Grahamstown, consists of a strip of vegetation approximately 260 yds. long and 50 yds. wide, in which there are two communities: 1) indigenous forest 2) exotic Pine forest (which has only one tree species Pinus pinaster). Throughout the thesis this species is referred to as the pine. The object of the investigation has been to determine whether these communities are natural or not. This has involved a study of the floristic composition, the life forms and the structure of the plant communities. In addition, various soil and environmental factors have been studied.
- Full Text:
Tecomaria
- Authors: Skead, C J (Cuthbert John)
- Date: 195u
- Subjects: Tecomaria capensis -- South Africa -- Photographs , Bignoniaceae -- South Africa -- Photographs
- Language: English
- Type: still image , photographs , landscape photographs
- Identifier: http://hdl.handle.net/10962/108772 , vital:33018
- Description: Caption reads: "Hedge of our garden at King Williams Town. 1950's."
- Full Text: false
- Authors: Skead, C J (Cuthbert John)
- Date: 195u
- Subjects: Tecomaria capensis -- South Africa -- Photographs , Bignoniaceae -- South Africa -- Photographs
- Language: English
- Type: still image , photographs , landscape photographs
- Identifier: http://hdl.handle.net/10962/108772 , vital:33018
- Description: Caption reads: "Hedge of our garden at King Williams Town. 1950's."
- Full Text: false
A measuring device in spelling
- Authors: Knipe, V H
- Date: 1949
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:21161 , http://hdl.handle.net/10962/6650
- Full Text:
- Authors: Knipe, V H
- Date: 1949
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:21161 , http://hdl.handle.net/10962/6650
- Full Text:
A standardisation of Professor Spearman’s “A measure of 'intelligence' for use in schools” and a discussion of the methods of factorial analysis as applied to the study of ability
- Authors: Butler, J E
- Date: 1949
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:20970 , http://hdl.handle.net/10962/5740
- Full Text:
- Authors: Butler, J E
- Date: 1949
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:20970 , http://hdl.handle.net/10962/5740
- Full Text:
Rhodes University College Graduation Ceremony 1949
- Rhodes University College, University of South Africa
- Authors: Rhodes University College , University of South Africa
- Date: 1949
- Language: English
- Type: text
- Identifier: vital:8083 , http://hdl.handle.net/10962/d1004393
- Description: Special Graduation Ceremony, Grahamstown, Saturday, 30th April, 1949.
- Full Text:
- Authors: Rhodes University College , University of South Africa
- Date: 1949
- Language: English
- Type: text
- Identifier: vital:8083 , http://hdl.handle.net/10962/d1004393
- Description: Special Graduation Ceremony, Grahamstown, Saturday, 30th April, 1949.
- Full Text:
Social organisation and social disorganisation : inaugural lecture delivered at Rhodes University College
- Authors: Irving, James, 1904-1969
- Date: 1949
- Language: English
- Type: Text
- Identifier: vital:639 , http://hdl.handle.net/10962/d1020708
- Description: Inaugural lecture delivered at Rhodes University College , Rhodes University Libraries (Digitisation)
- Full Text:
- Authors: Irving, James, 1904-1969
- Date: 1949
- Language: English
- Type: Text
- Identifier: vital:639 , http://hdl.handle.net/10962/d1020708
- Description: Inaugural lecture delivered at Rhodes University College , Rhodes University Libraries (Digitisation)
- Full Text:
The anodic oxidation of calcium lactate : an estimation of the products of electrolysis and an investigation into some of the problems involved
- Authors: Impey, Norman Robert Murray
- Date: 1949
- Subjects: Electrolytic oxidation
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4480 , http://hdl.handle.net/10962/d1012556 , Electrolytic oxidation
- Description: The subject of this thesis was chosen originally as a result of a suggestion made by a manufacturer of lactic acid. Lactic acid is made by a fermentation process from molasses and the acid is extracted from the fermentation liquors as calcium lactate. The conversion of the calcium lactate back to lactic acid is a tedious process from an industrial point of view. It was therefore suggested that the conversion may be more easily accomplished by electrolysis. The first experimental work was conducted with this object in view, but it soon became apparent that it was unlikely that lactic acid could be produced in suitable quantities for industrial purposes by this means. There was no reference in the literature to the electrolysis of calcium lactate, and little reference to the electrolysis of lactates in general, and what there was appeared to be conflicting, so it was decided to continue the investigation into the subject in order to determine what are the products of the anodic oxidation of calcium lactate. Intro., p.1.
- Full Text:
- Authors: Impey, Norman Robert Murray
- Date: 1949
- Subjects: Electrolytic oxidation
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4480 , http://hdl.handle.net/10962/d1012556 , Electrolytic oxidation
- Description: The subject of this thesis was chosen originally as a result of a suggestion made by a manufacturer of lactic acid. Lactic acid is made by a fermentation process from molasses and the acid is extracted from the fermentation liquors as calcium lactate. The conversion of the calcium lactate back to lactic acid is a tedious process from an industrial point of view. It was therefore suggested that the conversion may be more easily accomplished by electrolysis. The first experimental work was conducted with this object in view, but it soon became apparent that it was unlikely that lactic acid could be produced in suitable quantities for industrial purposes by this means. There was no reference in the literature to the electrolysis of calcium lactate, and little reference to the electrolysis of lactates in general, and what there was appeared to be conflicting, so it was decided to continue the investigation into the subject in order to determine what are the products of the anodic oxidation of calcium lactate. Intro., p.1.
- Full Text:
The construction of a precision conductance bridge and its application to a study of chromium sulphate complexes
- Authors: Goddard, Errol Desmond
- Date: 1949
- Subjects: Chromium
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4476 , http://hdl.handle.net/10962/d1012038 , Chromium
- Description: A constant temperature room employing the comparatively new method of temperature control by means of a thyratron relay has been constructed. A high precision conductance bridge has been built in a very convenient form. Improvements include the incorporation of a cathode ray oscilloscope as null detector and the inclusion of a very stable oscillator of the phase shift type which is capable of giving a very pure wave form. Tests carried out on a system of degenerative tuning showed the the system is not easily applicable to high gain amplifiers. A new form of conductometric titration cell, employing the dipping type electrodes has been designed with special precautions against possible Parker Effect. A series of tests has been carried out on three types of cell to ascertain the effects of absorption, polarisation and Parker Effect on the accuracy of an ordinary conductometric titration. Conductometric titrations of NaOH solutions of violet and green chromic sulphate has been carried out, and the effect of aging these solutions closely studied. In addition, conductometric titrations of BaCL₂ into the chromic solutions have been made, and the NaOH titrations have been studied potentiometrically as well.
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- Authors: Goddard, Errol Desmond
- Date: 1949
- Subjects: Chromium
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4476 , http://hdl.handle.net/10962/d1012038 , Chromium
- Description: A constant temperature room employing the comparatively new method of temperature control by means of a thyratron relay has been constructed. A high precision conductance bridge has been built in a very convenient form. Improvements include the incorporation of a cathode ray oscilloscope as null detector and the inclusion of a very stable oscillator of the phase shift type which is capable of giving a very pure wave form. Tests carried out on a system of degenerative tuning showed the the system is not easily applicable to high gain amplifiers. A new form of conductometric titration cell, employing the dipping type electrodes has been designed with special precautions against possible Parker Effect. A series of tests has been carried out on three types of cell to ascertain the effects of absorption, polarisation and Parker Effect on the accuracy of an ordinary conductometric titration. Conductometric titrations of NaOH solutions of violet and green chromic sulphate has been carried out, and the effect of aging these solutions closely studied. In addition, conductometric titrations of BaCL₂ into the chromic solutions have been made, and the NaOH titrations have been studied potentiometrically as well.
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A critical evaluation of the analytical method used for the separation and estimation of copper and nickel
- Authors: Sismey, J E
- Date: 1948
- Subjects: Copper -- Analysis , Nickel -- Analysis
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4519 , http://hdl.handle.net/10962/d1014335
- Description: [From Introduction]. This thesis deals with the determination of copper and nickel both separately and in each other's presence. The work is divided into two sections, one of which treats the subject from the theoretical side while the other contains an account of the practical work performed by the author. In the theoretical section, an attempt is made to summarise the better-known methods for the determination of copper and nickel, and at the same time, to incorporate such improvements, criticism and variations as have appeared in the literature. The subject is so vast that its summary in so short a space must necessarily be incomplete. Yoe and Server, for example, quote 111 references on the subject of the nickel-dimethylglyoxine with other ions. Only a fraction of the literature was available, and space permitted only a fraction of this to be abstracted in the following pages.
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- Authors: Sismey, J E
- Date: 1948
- Subjects: Copper -- Analysis , Nickel -- Analysis
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4519 , http://hdl.handle.net/10962/d1014335
- Description: [From Introduction]. This thesis deals with the determination of copper and nickel both separately and in each other's presence. The work is divided into two sections, one of which treats the subject from the theoretical side while the other contains an account of the practical work performed by the author. In the theoretical section, an attempt is made to summarise the better-known methods for the determination of copper and nickel, and at the same time, to incorporate such improvements, criticism and variations as have appeared in the literature. The subject is so vast that its summary in so short a space must necessarily be incomplete. Yoe and Server, for example, quote 111 references on the subject of the nickel-dimethylglyoxine with other ions. Only a fraction of the literature was available, and space permitted only a fraction of this to be abstracted in the following pages.
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