A critical study of methods for the determination of zinc in soils and plant materials
- Authors: Eve, Desmond John
- Date: 1955
- Subjects: Soils -- Zinc content , Soils -- Analysis , Plants -- Analysis
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4468 , http://hdl.handle.net/10962/d1011770 , Soils -- Zinc content , Soils -- Analysis , Plants -- Analysis
- Description: Although it is only fairly recently that the importance of trace elements in plant nutrition has been established, enormous advances have been made in this field of research and numerous publications of considerable scientific and economic importance, dealing with the subject, have appeared. The physiological functions of zinc in promoting plant growth have not all been satisfactorily identified as yet. There are indications, however, that zinc acts as a catalyst or regulator in plant metabolism. It appears too, that the element plays some role in chlorophyll formation. Zinc deficiency is associated with leaf chlorosis and a general collapse of v ital processes. The analysis of leaves and soils has become an essential part of the study of the nutritional diseases of plants and it is imperative that accurate and reliable methods of analysis should be available. Intro. p. 1.
- Full Text:
- Authors: Eve, Desmond John
- Date: 1955
- Subjects: Soils -- Zinc content , Soils -- Analysis , Plants -- Analysis
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4468 , http://hdl.handle.net/10962/d1011770 , Soils -- Zinc content , Soils -- Analysis , Plants -- Analysis
- Description: Although it is only fairly recently that the importance of trace elements in plant nutrition has been established, enormous advances have been made in this field of research and numerous publications of considerable scientific and economic importance, dealing with the subject, have appeared. The physiological functions of zinc in promoting plant growth have not all been satisfactorily identified as yet. There are indications, however, that zinc acts as a catalyst or regulator in plant metabolism. It appears too, that the element plays some role in chlorophyll formation. Zinc deficiency is associated with leaf chlorosis and a general collapse of v ital processes. The analysis of leaves and soils has become an essential part of the study of the nutritional diseases of plants and it is imperative that accurate and reliable methods of analysis should be available. Intro. p. 1.
- Full Text:
A sample survey of farming types in the divisions of Albany and Bathurst
- Authors: Davies, R J
- Date: 1955
- Subjects: Agriculture -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4885 , http://hdl.handle.net/10962/d1014733
- Description: [From Introduction]. It is the purpose of this thesis to examine some of the broad relationships which exist between different land use types and farming practises on the one hand and the geographical environment on the other. The enquiry is confined to the study of a number of farm units which have been selected within the area enclosed by the District of Albany and Bathurst situated in the south-East coastal belt of the Cape Province. The procedure adapted conforms broadly to that of a project carried out in South America by R.S. Platt of the University of Chicago and embodied in hls book "Latin America, Countryside and United Regions." Platt's project, he notes, consists of a collection of "small field studies in a frame of complex generalisations." It does not aim to give a complete geographical account of the regions he selected for investigation, but is an attempt to enlarge geograpical understanding of the respective areas.
- Full Text:
- Authors: Davies, R J
- Date: 1955
- Subjects: Agriculture -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4885 , http://hdl.handle.net/10962/d1014733
- Description: [From Introduction]. It is the purpose of this thesis to examine some of the broad relationships which exist between different land use types and farming practises on the one hand and the geographical environment on the other. The enquiry is confined to the study of a number of farm units which have been selected within the area enclosed by the District of Albany and Bathurst situated in the south-East coastal belt of the Cape Province. The procedure adapted conforms broadly to that of a project carried out in South America by R.S. Platt of the University of Chicago and embodied in hls book "Latin America, Countryside and United Regions." Platt's project, he notes, consists of a collection of "small field studies in a frame of complex generalisations." It does not aim to give a complete geographical account of the regions he selected for investigation, but is an attempt to enlarge geograpical understanding of the respective areas.
- Full Text:
A study of certain aspects of the Mount Coke Missionary Institution
- Authors: Walker, James Andrew
- Date: 1955
- Subjects: Shaw, William, 1798-1872 , Missions -- South Africa -- Eastern Cape , Missionaries -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Bachelor , BDiv
- Identifier: vital:1282 , http://hdl.handle.net/10962/d1013463
- Description: In searching for information concerning the chain of stations that William Shaw established from the Eastern Frontier of the Cape Colony towards Natal, I found that I had to consult many books. Many sources of information have recently come to light and this had to be analysed as well. In this work much had to be included that did not directly refer to Mount Coke, but it is relevant in that it affected the history of the Mission, and the effect of the Mission on the community as a whole. When histories of all the stations are written the incidents should show up in the right perspective.
- Full Text:
- Authors: Walker, James Andrew
- Date: 1955
- Subjects: Shaw, William, 1798-1872 , Missions -- South Africa -- Eastern Cape , Missionaries -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Bachelor , BDiv
- Identifier: vital:1282 , http://hdl.handle.net/10962/d1013463
- Description: In searching for information concerning the chain of stations that William Shaw established from the Eastern Frontier of the Cape Colony towards Natal, I found that I had to consult many books. Many sources of information have recently come to light and this had to be analysed as well. In this work much had to be included that did not directly refer to Mount Coke, but it is relevant in that it affected the history of the Mission, and the effect of the Mission on the community as a whole. When histories of all the stations are written the incidents should show up in the right perspective.
- Full Text:
An investigation into the insect ecology of citrus orchards, with special reference to citrus mussel scale (Lepidosaphes beckii newm.)
- Carnegie, Alistair John Michael
- Authors: Carnegie, Alistair John Michael
- Date: 1955
- Subjects: Citrus -- Diseases and pests -- South Africa -- Eastern Cape , Lepidosaphes
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5905 , http://hdl.handle.net/10962/d1014637
- Description: In the course cf the last fifteen years the general lnsect ecology of citrus orchards in the Eastern Cape has provided the subject matter of four theses presented for the degree of M.Sc. of Rhodes University. The false codlin moth, Argyroploce leucotreta Meyr., formed the subject of a thesis by Horne in 1939. Then in 1941 the same insect formed the subject matter of a thesis by Harris. The general ecology of a citrus orchard, with special regard to the biological control of citrus red scale, Aonidiella aurantii Mask., was the subject matter of Whitehead's thesis in 1948. This was a much more general investigation than the preceding two theses, and touched on many more aspects of citrus ecology. Another thesis dealing with more general citrus ecology was that of Smithers in 1953.
- Full Text:
- Authors: Carnegie, Alistair John Michael
- Date: 1955
- Subjects: Citrus -- Diseases and pests -- South Africa -- Eastern Cape , Lepidosaphes
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5905 , http://hdl.handle.net/10962/d1014637
- Description: In the course cf the last fifteen years the general lnsect ecology of citrus orchards in the Eastern Cape has provided the subject matter of four theses presented for the degree of M.Sc. of Rhodes University. The false codlin moth, Argyroploce leucotreta Meyr., formed the subject of a thesis by Horne in 1939. Then in 1941 the same insect formed the subject matter of a thesis by Harris. The general ecology of a citrus orchard, with special regard to the biological control of citrus red scale, Aonidiella aurantii Mask., was the subject matter of Whitehead's thesis in 1948. This was a much more general investigation than the preceding two theses, and touched on many more aspects of citrus ecology. Another thesis dealing with more general citrus ecology was that of Smithers in 1953.
- Full Text:
An investigation of the spectra and decay times of some organic phosphors under ultraviolet and ionising radiation
- Authors: Little, W A
- Date: 1955
- Subjects: Phosphors -- Spectra
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5530 , http://hdl.handle.net/10962/d1012733
- Description: In this thesis I have given an account of the work carried out by me on the measurement of the spectra and decay times of a few selected organic phosphors under ultraviolet and ionising radiation. The purpose of the investigation has been to attempt to throw more light on the mechanism by which energy migrates within the crystalline lattice. A general introduction is given to the process of fluorescence and the various proposed theories by which the excitation energy, which eventually appears as fluorescence light, is able to move about in the crystalline lattice. Preface, p. 1.
- Full Text:
- Authors: Little, W A
- Date: 1955
- Subjects: Phosphors -- Spectra
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5530 , http://hdl.handle.net/10962/d1012733
- Description: In this thesis I have given an account of the work carried out by me on the measurement of the spectra and decay times of a few selected organic phosphors under ultraviolet and ionising radiation. The purpose of the investigation has been to attempt to throw more light on the mechanism by which energy migrates within the crystalline lattice. A general introduction is given to the process of fluorescence and the various proposed theories by which the excitation energy, which eventually appears as fluorescence light, is able to move about in the crystalline lattice. Preface, p. 1.
- Full Text:
Measurements of the solubilities of some silver halides in water by electrical methods
- Authors: Malan, George McPherson
- Date: 1955
- Subjects: Silver halides -- Solubility , Silver halides -- Analysis , Conductometric analysis , Potentiometry , Silver halides
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4515 , http://hdl.handle.net/10962/d1013502
- Description: [Introduction, p. 3] The solubilities of the silver halides cannot be determined by the conventional methods of analytical chemistry because they are too sparingly soluble (of the order 1 x 10⁻⁵ to 1 x 10⁻⁶ g . equiv./1. at 25°C.) However, electrical, and to a lesser extent optical methods, are admirably suited because of their greater sensitivity. The conductometric and potentiometric methods are the two most important electrical techniques for the measurement of the solubilities of sparingly soluble salts, and are the ones employed in this research. There are large discrepancies between the published values for the solubility of silver chloride. Results obtained by the conductometric and potentiometric methods disagree. In addition, figures quoted by independent authors using the same method differ by as much as 15%.
- Full Text:
- Authors: Malan, George McPherson
- Date: 1955
- Subjects: Silver halides -- Solubility , Silver halides -- Analysis , Conductometric analysis , Potentiometry , Silver halides
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4515 , http://hdl.handle.net/10962/d1013502
- Description: [Introduction, p. 3] The solubilities of the silver halides cannot be determined by the conventional methods of analytical chemistry because they are too sparingly soluble (of the order 1 x 10⁻⁵ to 1 x 10⁻⁶ g . equiv./1. at 25°C.) However, electrical, and to a lesser extent optical methods, are admirably suited because of their greater sensitivity. The conductometric and potentiometric methods are the two most important electrical techniques for the measurement of the solubilities of sparingly soluble salts, and are the ones employed in this research. There are large discrepancies between the published values for the solubility of silver chloride. Results obtained by the conductometric and potentiometric methods disagree. In addition, figures quoted by independent authors using the same method differ by as much as 15%.
- Full Text:
Rhodes University Graduation Ceremony 1955
- Authors: Rhodes University
- Date: 1955
- Language: English
- Type: text
- Identifier: vital:8089 , http://hdl.handle.net/10962/d1004399
- Description: Rhodes University Graduation Ceremony in the Grahamstown City Hall on Friday , 1st April, 1955, at 8 p.m. [and] Graduation Ceremony held in April 1955: University College of Fort Hare. Graduation Ceremony. April 29th ,1955.
- Full Text:
- Authors: Rhodes University
- Date: 1955
- Language: English
- Type: text
- Identifier: vital:8089 , http://hdl.handle.net/10962/d1004399
- Description: Rhodes University Graduation Ceremony in the Grahamstown City Hall on Friday , 1st April, 1955, at 8 p.m. [and] Graduation Ceremony held in April 1955: University College of Fort Hare. Graduation Ceremony. April 29th ,1955.
- Full Text:
Some problems and methods of measuring the growth of African negroid populations
- Myburgh, Corneles Albert Lloyd
- Authors: Myburgh, Corneles Albert Lloyd
- Date: 1955
- Subjects: Africa -- Population -- Statistics , Demography -- Africa , Population forecasting -- Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3388 , http://hdl.handle.net/10962/d1013560
- Description: A dissertation ... giving details of problems and methods of obtaining statistics of the more important demographic aspects of the African Negroid populations, that is the size of a population, its sex and age distribution, migration movements, deaths and rates of increase.
- Full Text:
- Authors: Myburgh, Corneles Albert Lloyd
- Date: 1955
- Subjects: Africa -- Population -- Statistics , Demography -- Africa , Population forecasting -- Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3388 , http://hdl.handle.net/10962/d1013560
- Description: A dissertation ... giving details of problems and methods of obtaining statistics of the more important demographic aspects of the African Negroid populations, that is the size of a population, its sex and age distribution, migration movements, deaths and rates of increase.
- Full Text:
Studies of Hypnea spicifera
- Authors: Hewitt, Florence E
- Date: 1955
- Subjects: Marine algae
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4271 , http://hdl.handle.net/10962/d1018234
- Full Text:
- Authors: Hewitt, Florence E
- Date: 1955
- Subjects: Marine algae
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4271 , http://hdl.handle.net/10962/d1018234
- Full Text:
The teaching of the Acts of the Apostles concerning the Holy Spirit
- Authors: Woods, B J
- Date: 1955
- Subjects: Bible. Acts , Holy Spirit
- Language: English
- Type: Thesis , Bachelor , BDiv
- Identifier: vital:1281 , http://hdl.handle.net/10962/d1013453
- Description: There must be certain reasons why one embarks on a study of the Holy Spirit. The first is perhaps because there is a need today for a Biblical doctrine of the Spirit. The second follows from the first, for there is a need for a deeper knowledge of the Spirit and His work. He is the life-giving Spirit, and we need today to be spiritually alive. The third reason for a study of this kind is that we need a deeper understanding of the power of the Spirit in the affairs of men in the world. We have got away from the idea that God works amongst us through His Spirit, and we tend to think more and more of the achievements of man, and the power of the machine to do as we wish. We need to return to the power of the Spirit, and to be instruments of God's wishes. Finally, our Christianity today, in this country, appears to be so lifeless, so stuck in the groove of routine - the interminable bazaars, money raising efforts, and social half-hours - that we have lost the enthusiasm of first century Christianity, the driving force of the Spirit spurring us on to bring the Gospel of Life to the hungry world. We need in our modern experience and our modern condition, to find the powerful enthusiasm, as a result of the Spirit' s working in us, that the early Christians found when they were filled with Him and worked under His guidance. So we undertake the study of the Spirit among the early Church, in the hope that we too may desire to be filled as the Apostles were filled.
- Full Text:
- Authors: Woods, B J
- Date: 1955
- Subjects: Bible. Acts , Holy Spirit
- Language: English
- Type: Thesis , Bachelor , BDiv
- Identifier: vital:1281 , http://hdl.handle.net/10962/d1013453
- Description: There must be certain reasons why one embarks on a study of the Holy Spirit. The first is perhaps because there is a need today for a Biblical doctrine of the Spirit. The second follows from the first, for there is a need for a deeper knowledge of the Spirit and His work. He is the life-giving Spirit, and we need today to be spiritually alive. The third reason for a study of this kind is that we need a deeper understanding of the power of the Spirit in the affairs of men in the world. We have got away from the idea that God works amongst us through His Spirit, and we tend to think more and more of the achievements of man, and the power of the machine to do as we wish. We need to return to the power of the Spirit, and to be instruments of God's wishes. Finally, our Christianity today, in this country, appears to be so lifeless, so stuck in the groove of routine - the interminable bazaars, money raising efforts, and social half-hours - that we have lost the enthusiasm of first century Christianity, the driving force of the Spirit spurring us on to bring the Gospel of Life to the hungry world. We need in our modern experience and our modern condition, to find the powerful enthusiasm, as a result of the Spirit' s working in us, that the early Christians found when they were filled with Him and worked under His guidance. So we undertake the study of the Spirit among the early Church, in the hope that we too may desire to be filled as the Apostles were filled.
- Full Text:
Yellowwood
- Authors: Skead, C J (Cuthbert John)
- Date: 1955
- Subjects: Podocarpus latifolius -- South Africa -- Photographs , Trees -- South Africa -- Photographs
- Language: English
- Type: mixed material , photographs , landscape photographs
- Identifier: http://hdl.handle.net/10962/117177 , vital:34488
- Description: Caption "Yellowwood log full-dryed out of valley during dam-building operation on farm. Amabele, Jack Blaine, c. 1955. In an open valley where owner had never known trees. But lower down yellowwood grew well. Identified as yellowwood of forest. Jack Blaine, left and John Beck outside.”
- Full Text: false
- Authors: Skead, C J (Cuthbert John)
- Date: 1955
- Subjects: Podocarpus latifolius -- South Africa -- Photographs , Trees -- South Africa -- Photographs
- Language: English
- Type: mixed material , photographs , landscape photographs
- Identifier: http://hdl.handle.net/10962/117177 , vital:34488
- Description: Caption "Yellowwood log full-dryed out of valley during dam-building operation on farm. Amabele, Jack Blaine, c. 1955. In an open valley where owner had never known trees. But lower down yellowwood grew well. Identified as yellowwood of forest. Jack Blaine, left and John Beck outside.”
- Full Text: false
Yellowwood
- Authors: Skead, C J (Cuthbert John)
- Date: 1955
- Subjects: Podocarpus latifolius -- South Africa -- Photographs , Trees -- South Africa -- Photographs
- Language: English
- Type: mixed material , photographs , landscape photographs
- Identifier: http://hdl.handle.net/10962/117236 , vital:34492
- Description: Caption "Yellowwood log full-dryed out of valley during dam-building operation on farm. Amabele, Jack Blaine, c. 1955. In an open valley where owner had never known trees. But lower down yellowwood grew well. Identified as yellowwood of forest. Jack Blaine, left and John Beck outside.”
- Full Text: false
- Authors: Skead, C J (Cuthbert John)
- Date: 1955
- Subjects: Podocarpus latifolius -- South Africa -- Photographs , Trees -- South Africa -- Photographs
- Language: English
- Type: mixed material , photographs , landscape photographs
- Identifier: http://hdl.handle.net/10962/117236 , vital:34492
- Description: Caption "Yellowwood log full-dryed out of valley during dam-building operation on farm. Amabele, Jack Blaine, c. 1955. In an open valley where owner had never known trees. But lower down yellowwood grew well. Identified as yellowwood of forest. Jack Blaine, left and John Beck outside.”
- Full Text: false
Yellowwood
- Authors: Skead, C J (Cuthbert John)
- Date: 1955
- Subjects: Podocarpus latifolius -- South Africa -- Photographs , Trees -- South Africa -- Photographs
- Language: English
- Type: mixed material , photographs , landscape photographs
- Identifier: http://hdl.handle.net/10962/117246 , vital:34493
- Description: Caption "Yellowwood log full-dryed out of valley during dam-building operation on farm. Amabele, Jack Blaine, c. 1955. In an open valley where owner had never known trees. But lower down yellowwood grew well. Identified as yellowwood of forest. Jack Blaine, left and John Beck outside.”
- Full Text: false
- Authors: Skead, C J (Cuthbert John)
- Date: 1955
- Subjects: Podocarpus latifolius -- South Africa -- Photographs , Trees -- South Africa -- Photographs
- Language: English
- Type: mixed material , photographs , landscape photographs
- Identifier: http://hdl.handle.net/10962/117246 , vital:34493
- Description: Caption "Yellowwood log full-dryed out of valley during dam-building operation on farm. Amabele, Jack Blaine, c. 1955. In an open valley where owner had never known trees. But lower down yellowwood grew well. Identified as yellowwood of forest. Jack Blaine, left and John Beck outside.”
- Full Text: false
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