The use of brass forceps instead of ivory tipped ones for handling fine weights is to be condemned. ... as roasting, assay of matte, of high grade silver sulphides, of cyanide solutions, of base bullion, of silver and gold bars, of blister copper and ... The entire field, from the preliminary observations to the final quantitative estimation of the gold in ore, is covered and the work constitutes a manual of assaying.
|Title||:||The Mineral Industry, Its Statistics, Technology, and Trade ...|
|Author||:||Richard Pennefather Rothwell, Joseph Struthers, David Hale Newland, Edward K. Judd, Walter Renton Ingalls|