Smith, Matthew1990-02-101990-02-101990-02-10http://hdl.handle.net/10539/8089Paper presented at the Wits History Workshop: Structure and Experience in the Making of Apartheid, 6-10 February, 1990Mining disaster in instalments: the completion of the foundations for the modern health and safety system on the Witwatersrand gold mines 1930 -1939Working Paper