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Item Analyses of samples from boreholes 2 and 3 on "Bankfontein 503" near Uitkyk, Transvaal(1936) Hall, PEThese two borehole were sunk by the Minnaar-Witbank Colliery during February 1936.Item Preliminary report of samples of No. 4 seam from borehole cores put down on Klipplaat 47, Tweefontein 69 and Waterpan 68 by Tweefontein United Collieries Limited(1937) Vogel, JCSamples of No. 4 seam were obtained from seven boreholes. The cores were, in part, broken and incomplete.Item Survey report no. 57 Report on samples obtained from boreholes put down by the Anglo-Transvaal Collieries, Ltd., on the farm Grootpan 67 in the Witbank district of Transvaal(1943) Quass, FWThis report details a series of six boreholes put down by the Anglo-Transvaal collieries Ltd., on the farm Grootpan in the Witbank District of Transvaal.Item Report on the shipment of coal from the Merthyr colliery(1943) Tromp, FJThis report details the questioning of the liability of Merthyr coal to spontaneous combustion, and whether it constitutes a danger to life or property.Item Survey report No. 60 Report on boreholes put down by G.S.O., on the farms Leliefontein 25, Kranspan 85, Leeuwenburg 273, Smitsfield 137, Driefontein 139, coalbank 77, Liefgekozen 183, and Bloemkranz 185, in the Eastern portion of the Ermelo district of Transvaal(1943) Quass, FWIn September, 1939, an intensive survey of the torbanite occurrences in the vicinity of Mooifontein 287, north of Ermelo, was begun by the Geological survey.Item Survey report No. 67 Report on boreholes put down by the South African Iron and Steel Corporation on the farms welstand 34, Rietkuil 27, Diepspruit 25 and Roodepoort 24, In the Bethal district of Transvaal(1944) Gaigher, BDuring 1942 a series of 14 boreholes was put down by the South African Iron and Steel Industrial Corporation on the farms Welstand 34, Rietkuil 27, Diepspruit 25 and Roodepoort 24, in the Bethal District of TransvaalItem A contribution to the study of the production of carbonaceous zeolites from bituminous coal(1944) La Grange, CCThis report described work done at the Institute to ascertain whether South African coals could be used in the preparation of carbonaceous zeolites. The object of the present investigation was to determine whether South African coal would provide a suitable raw material for the production of zeolites.Item Survey report no. 66 Report put down by the Middleburg steam coal and coke company on the farms Hartebeestfontein 134 and Blesbokfontein 130 in the Bethal district of Transvaal(1944) Gaigher, BDuring the period December 1941 to January 1942, three boreholes were put down by the Middleburg Steam Coal and Coke Company on the farms Hartebeesfontein and Blesbokfontein in the Bethal district of Transvaal.Item Spontaneous combustion and ventilation on board ship(1944) Tromp, FJThis report contains details of investigations into spontaneous combustion and ventilation.Item Report on samples taken from the No. seam at the Schoongezicht colliery, Witbank district(1945) Van der Merwe, CCThis is a report on samples taken from the No. seam at the Schoongezicht colliery, Witbank district. For the purpose of further and more detailed investigation, samples based on the proximate analyses were made up.Item The breakage of South African coal during preparation, haulage and shipping(1945) Tromp, FJ; Bushell, LAWork published by the FRI shows that the relative friability or the relative ease of disintegration of coal, can be measured by its shatter index.Item Combustion tests on South African anthracite and coal(1946) Quass, FWIn order to establish the relative suitable for steam raising purposes of South African anthracite, firing tests were carried out in an experimental furnace on a number of nut size largely on the anthracite.Item A comparison of the percentage volatile matter determined on different sizes of coal(1946) Quass, FW; Coetzee, SDVolatile determinations were carried out on nut and powdered coal samples in an electric muffle furnace.Item Report on visits to Lourenco Marques in connection with the spontaneous heating of uitkyk export coal in the S.S. Amstelstad(1948) La Grange, CC; Petrick, AJAn officer of the Institute was accordingly sent to Lourenco Marques to obtain first hand information on excessive heating matter.Item A graphical method for assessing the relative suitabilities of coal washing processes from float and sink and relevant data(1949) Van der Walt, PJThe problem of predicting practical yield and ash values when washing coal in a specified type of washer based on float and sink data obtained from laboratory tests is discussed in this report.Item Survey report No. 102 The physical and chemical survey of the No. 2 seam at Transvaal Navigation colliery, Bethal district , Transvaal(12pp, 1949) Berry, HThis colliery is situated on the farm Vlaklaagte 35, close to the northern boundary of the Bethal Magisterial District and approximately midway between the towns of' Witbank and Bethal.Item The physical and chemical survey of the No.4 seam at Alpha Colliery, district Witbank, Transvaal survey(1949) Berry, HThe No. 4 seam at this colliery, judging from the diagrammatic representations at the end of the report, appears to maintain a uniform structure and a fairly consistent thickness throughout the mine.Item Some economic aspects of the production and transmission of manufactured gas(1949) Doornum, GAWUtilization of the Union's low grade coal reserves may be considered to be of great importance for the industrial development of the country, and the generation of electric power at the pithead shows a way in which this can be accomplished. Technical considerations have only been introduced where they bear directly on the economic aspects, which form the main substance of this report.Item Tests to determine the suitability of selected fuels in S.A.R. Dining saloon stoves(1949) La Grange, C.C; Van Doornum, GAWDuring 1948 the South African Railways and Harbors Administration approached the Institute with the request for collaboration in an investigation aimed at rendering fires in dining saloon stoves smokeless while trains were in large stations - more especially the new Johannesburg station where every effort was to be made to eliminate the smoke nuisance.Item Investigation of the possible formation of explosive mixtures during the impregnation of timber(1950) Blitz, JG; Uys, JM; Petrick, AJThe introduction of oil mixtures for impregnating timber in which penta-chloro-phenol is the active medium and kerosene the major vehicle component caused some apprehensive that explosive mixtures might be formed in the impregnation vessels.