Author:Savage, WHDDate:1972In Bulletin No 76, which gave average data for 1971, it was mentioned that Enyati and Vaalbank collieries ceased production during that year.Read more
Author:Krauklis, HDate:Aug 1985The study revealed that the structure of the South African air transport industry is unbalanced. While SAA minimizes logistics problems for the airline and offer passengers the comfort of jet travel by standardizing its fleet to two aircraft ...Read more
Author:Endrody-Younga, SDate:Sep 1982A study of the composition, biology and impact of the arthropod fauna associated with dung and other decaying matter was carried out on the Nylsvley Nature Reserve and on a neighbouring farm from June 1975 to July 1976. A total of 100 638 ...Read more
Author:Jacobsen, NHGDate:Dec 1977A survey of the distribution, status and general ecology of amphibians, reptiles and mammals was undertaken on the Nylsvley Nature Reserve, Transvaal from mid-1974 to mid-1977 as part of the South African Savanna Ecosystem Project. A total ...Read more
Author:Savage, WHDDate:1965During the past eighteen months discussions have been held with the Anthracite Producers Association on the desirability of altering and introducing a second and possibly a third grade.Read more
Author:Viljoen, GADate:1972The first apparatus operating on the principle of a change in the buoyant force with progressive settling was constructed along the following lines. A suitable shaped glass cylinder was suspended from one arm of a chemical balance so that it ...Read more
Author:Raab, GADate:1973The effects of mechanisation in coal mining were investigated by the NCB Scientific Department and some data were published in "second Symposium on Coal Preparation" 21st to 25th October, 1957, University of Leeds.Read more
Author:Jooste, FJ; Lourens, JPDate:Sep 1998The broad objective is to make recommendations for appropriate modelling procedures to be used in the structural design of asphalt layers. Findings of this investigation are intended to be used in refining and validating existing asphalt ...Read more
Author:Paige-Green, P; Coetzer, K; Lea, J; Semmelink, CDate:17 Jun 2009The use of locally materials in low volume rural roads can result in significant cost savings. However, this is associated with an increased risk of premature distress or failure. A compromise needs to be found between the probability of ...Read more
Author:Safriel, O; Bruton, MNDate:Jun 1984During the past few years the National Programme for Environmental Sciences has been involved in assessing the potential of aquaculture in South Africa and in formulating a research policy which will provide the information needed to place ...Read more
Author:Archer, Emma RMDate:Jan 2013On the 2nd of November, 2011, South Africa’s Minister of Water and Environmental Affairs tabled the draft South African Weather Service Amendment Bill to the National Assembly. After the period for written comment closed, in January 2012, ...Read more
Author:Sevenster, PG; Meintjies, AA; Van Den Berg, PJDate:1969In continuing the investigation into the causes of the lesser susceptibility of South African coal dust to explosion, attention has been given to the relationship between the petrographic of coals and their explosibility.Read more
Author:Heydorn, AEFDate:Aug 1986During a meeting of the South African National Committee for Oceanographic Research (SANCOR) Estuaries Programme Committee held on 12 and 13 October 1983 at San Lameer, Natal, consideration was given to a working paper on the freshwater ...Read more
Author:De Moor, IJ; Bruton, MNDate:1988This report serves as an introduction to the problem of alien and translocated aquatic animals in southern Africa is given followed by checklists of the different species which have been introduced into or translocated within the subcontinent. ...Read more
Author:Callaghan, BGDate:1991Atmospheric corrosion is one the most widespread causes of metal and alloy degradation known. We only have to look at the corrosion of structural steelwork in buildings, bridges and other forms of construction to recognize the enormous wastage ...Read more
Author:Tyson, PD; Kruger, FJ; Louw, CWDate:Apr 1988This report is a review of available information on the dispersion climatology, the degree of atmospheric pollution and the various impacts of that pollution on man and environment in the Eastern Transvaal Highveld (ETH) and adjacent regions. ...Read more