Report of the Coloured Labour Compound Commission appointed to enquire into the cubic amount of air-space in the compounds of the mines of the Witwatersrand.

Date:
1905
Catalogue details

Licence: In copyright

Credit: Report of the Coloured Labour Compound Commission appointed to enquire into the cubic amount of air-space in the compounds of the mines of the Witwatersrand. Source: Wellcome Collection.

Provider: This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.

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    Appendix B. (2A Johannesburg, gth September, 1904. J. Harry Johns, Esq., Chairman, Ventilation Sub-Committee, Transvaal Chamber of Mines, Johannesburg. Sir, Please find herewith results of analyses of nine samples of air taken at the New Comet Chinese Compound (Room 70) during the night of the 31st August, 1904, together with our comments thereon. The samples were taken in duplicate and almost simultaneously, followed immediately by an outside air sample. The analyses were conducted by all four analysts under the same conditions as the previous samples. We have the honour to be. Sir, Your obedient servants, Prof. Aug. Prister, B. Bay, Ph.D., M.A., A. Heymann, M.Ch., M.Ph., M.A., James Moir, D.Sc., M.A., F.C.S. B. Bay, Ph.D., M.A., Edw. H. Croghan. RESULT OF ANALYSES.—New Comet Chinese Compound. Average Number Velocity Barometer Carbonic acid Number Time Number of of of Air Tempera- Reading in parts Place of 'i'aken. Persons Candles near ture. in per 1,000 of Sample. in Room. and Lamps. Shutter. Millimetres. by Volume. Sampling 1 11 p.m. 10 2 candles 110 feet 18° C. 032 0-71 A. 2 ,, ,, ()• 76 B. 3 1 a.m. 2 candles & 14° C. 0- 70 A. 1 Lamp 4 ,, 0.78 B. 5 3 a.m. 1.5 1 candle & t|-48 A. 1 Lamp 6 ” ’ ■ (K 70 B. Outside Samples. 7 11 p.m. 14° C. 03-2 0-37 8 1 a.m. 12° C. ,, 0-34 !) 3 a.rn. 11° C. ■■ 032 Remarks.—The fire was out wlien samples l-O were taken. Cub'c space of room ivas 4,2.5.5 cubic feet. Weather conditions ; a fair lireeze was lilowing all through the night.