List of sources:
Addresses and papers read at the joint meeting of the British and South African Associations for the Advancement of Science held in South Africa, 1905 (3 vols). Johannesburg: SAAAS.
British Association for the Advancement of Science. Report of the seventy-fifth meeting..., South Africa, 1905.
National Union Catalogue, pre-1956 imprints. London: Mansell, 1968-1980.
Rendell, E.F. Rand power. Scientific South Africa, January 1966, Vol. 3(3), pp. 7-11.
Robert Hammond. In Grace s Guide to British Industrial History.
Downloaded from http://www.gracesguide.co.uk/Robert_Hammond
on 2017-5-29.
Royal Society of London. Catalogue of scientific papers, 1800-1900. London: Royal Society, 1867-1925.