John Stewart MacArthur
From Graces Guide
John Stewart MacArthur (1857-1920), chemist.
1886 Macarthur was employed by the Tharsis Sulphur and Copper Co. to investigate the viability of H. R. Cassel's process for extracting gold. He demonstrated that the process, which employed common salt as the extracting agent, was worthless.
Within a year, however, MacArthur had developed his own process in collaboration with brothers R. W. and W. Forrest, physicians in Glasgow. The MacArthur-Forrest process used sodium or potassium cyanide as the extracting agent. As a result the level of gold recoverable was increased from 55 per cent to 95 per cent.
MacArthur became MD of the Cassel Gold Extracting Co
1897 He formed a partnership with Alfred Trewartha James as consulting mining engineers.
See Also
Loading...