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Utilization of solar energy in South Africa

Author: Whillier, A Date: Apr 1953 Design curves based on measurements of solar irradiation in South Africa are presented for two geographic areas, the highveld and the Cape Peninsula, giving data on the amount of thermal energy that can be collected from the sun by use of ... Read more
CSIR Annual report 1961

Author: CSIR Date: 1961 In the presentation of this report, attention is directed to the research services provided by the Council for industry, local authorities, provincial administrations and government departments. Read more
New species of Pseudagrion ( Odonata: Zygoptera) with descriptions of the larvae of five other species belonging to the genus

Author: Chutter, FM Date: 1962 In the course of an ecological survey of the macro-invertebrate fauna of the stream and rivers in the catchment of the Vaal Dam the author found a new species of Pseudagrion which is described here. The author’s colleagues, engaged in similar ... Read more
New species of scytonema agardh (Cyanophyta)

Author: Welsh, H Date: 1963 The author is indebted to Dr. A.D Harrison of the Department of Zoology, University of Rhodesia and Nyasaland, Salibury, for sending him some algal material collected on the 25th of April 1962, in a granophyre rock pool high above the Lundi ... Read more
Collection of Hirudinea submitted by F.M. Chutter (national institute for water research, Pretoria) and the geographical distribution of Hirudinea in South Africa

Author: Sciacchitano, I Date: Aug 1963 The leeches collected from the Vaal Barrage and from the streams and rivers of the Vaal dam Catchment Barrage by F.andM. from Chutter, which I have just studied, constitute a collection of 121 specimens. I sincerely thank Mr F. M. Chutter for ... Read more
Some new and rare diatoms from South Africa 2. Diatoms from lake Sibayi and lake Nhlange in Tongaland (Natal)

Author: Archibald, REM Date: 1966 In January, 1966, the Zoology Department of Rhodes University, Grahamstown, undertook a second expedition to Lake Sibayi under the leadership of Professor B. R Allanson. Lake Sibayi is a lake situated in the central littoral section of Tongaland ... Read more
Some new and rare Nitzschiae (Diatomaceae) from the Vaal dam catchment area (South Africa)

Author: Archibald, REM Date: 1966 In studies of the ecology of diatoms, particularly in the case of studies concerned in any way with organic pollution, one of the most important genera of diatoms concerned is the genus Nitzschia Hassall. Read more
Contributions of the Diatom flora of South Africa

Author: Giffen, MH Date: 1966 The diatom flora of the marine littoral of South African coatal river estuaries is very superficially known. In a previous contribution (Giffen 1963) the author dealt with the diatoms of the Eastern Cape Province estuaries namely the Gulu ... Read more
Reliability of a method of sampling stream invertebrates

Author: Chutter, FM ; Noble, RG Date: May 1966 In field ecological studies inferences must often be drawn from dissimilarities in numbers and species of organisms found in biological samples collected at different times and under various conditions. Read more
Nutrient composition of some edible wild fruits found in the Transvaal

Author: Wehmeyer, AS Date: 17 Dec 1966 The nutrient content of 9 species of wild fruits growing in the Transvaal was determined in the laboratory were the research was conducted. In order to simplify the removal of the flesh from the stones, the fruits were in most cases freeze-dried ... Read more
New and Interesting Cyanophytes from the Kowie river system in the Eastern Cape Province (South Africa) II.

Author: Archibald, CGM Date: 1967 The thallus is not gelatinous but is diffuse and pale grey-green in colour. The trichomes are without a sheath and are straight or curved, often closely entangled and rarely coiled. The dull blue- green trichomes are markedly constricted at ... Read more
Removal of the microorganisms from water. Part 1: Introduction, water-borne disease and the microorganisms involved.

Author: Duuren, FR Date: 1967 Waters differ greatly in physical and chemical quality and in content of microorganisms. The quality of the water is clearly related to the contents and types of organisms present and both of this aspect is the object of intensive study at present. Read more
On the ecology of the fauna of stones in the current in a South African river supporting a very large simulium (Diptera) population

Author: Chutter, FM Date: Dec 1968 There is a large population of Simulium chutteri lewis in the Vaal river at and below the village of Warrenton in the north-east of the Cape Province, South Africa. The female of this species attacks man, cattle and horses and had become a ... Read more
Preparation of edible wild fruit and plant samples for analysis and some difficulties encountered in such analyses

Author: Strydom, ESP ; Wehmeyer, AS Date: Dec 1969 Freeze-dried samples are used for analysis and the methods of preparation of samples for freeze-drying are discussed. Freeze-drying has obvious advantages but has also a few minor disadvantages. Difficulties encountered in the determination ... Read more
New and interesting marine and littoral diatoms from sea point, near Cape Town, South Africa

Author: Giffen, MH Date: 1970 During a visit to Cape town in December 1967, the opportunity was sized to visit the sea shore at Sea point, a suburb and seaside resort near Cape Town, For the purpose of obtaining fertile class material of Laminaria, Ecklonea and polysiphonia ... Read more
Hydrobiological studies in the catchment of Vaal dam, South Africa. Part 1. River Zonation and the Benthic Fauna

Author: Chutter, FM Date: 1970 Vaal Dam is situated on the elevated plateau which forms the interior of South Africa and is a little less than 1500 m above the level. The source of the most of the streams and rivers flowing into the dam are about 2000 m above sea level, ... Read more
Hydrobiological studies in the catchment of Vaal dam, South Africa part 3. Notes on the Cladocera and Copepoda of stones-in-current, marginal vegetation and stony backwater biotopes

Author: Chutter, FM Date: 1971 A general description of the study area be found in part 1(Chutter, 1970), where the fauna other than Cladocera and Copera of store-in-current, marginal vegetation and story backwater has been described. It was found that the streams and ... Read more
Diatoms from the Vaal dam catchment area Transvaal, South Africa

Author: Archibald, REM Date: 1971 The Vaal Dam is of great importance to South Africa as it ensures a good supply of water to the Witwatersrand complex, South Africans most important industrial and mining centre, and the problem of pollution and protection of the waters flowing ... Read more
Marine littoral diatoms from the Gordon’s bay region of False Bay, Cape Province, South Africa

Author: Giffen, MH Date: 1971 The Gordon’s Bay region occupies the North western corner of false Bay, a large rectangular bay, bounded on the west by the Cape Peninsula ending at Cape Point, on the east by the precipitous slope of the Steenbras Mountains ending at the ... Read more
Further contribution to the diatom flora of sewage enriched waters in southern Africa

Author: Schoeman, FR Date: 1972 The systematics and autecology of the diatoms observed in an algal sample from a maturation pond of the Walvis Bay (south west African coast) sewage works are discussed. Fourteen diatoms species are recorded. A new specie, Amphora subacutiuscula, ... Read more

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