Show NEW BOOKS the copper handbook volume 11 walter L harvey weed houghton mich 1413 pp ap cloth 5 for sale by the salt lake mining review former issues of this work by horace J stevens were considered the standard authority on the subject of copper and copper mines for the entire globe the new work has been entirely rewritten by walter harvey weed the new volume ha has s several innovations which make it very much more valuable to the reader the most important is unquestionably the geographical index which gives I 1 at a glance the names of all mining companies operating in or near any town in america or in any foreign country if you forget the name of the company but remember the locality this list enables you to spot it mr weed has also separated all dead companies and grouped them in a dead list in which the vital facts and references are given the greater part of the book as in former annual editions is devoted to descriptions of the copper mines of the world the amount of their holdings their officials finances profits and loss costs output nature of ore geology methods of mining milling and smelting smelling sm elting with descriptions of plants and probable future successful or otherwise of the company mine sampling and valuing by C S herzig PP cloth 2 for sale by the salt lake mining review this handy little book contains chapters on principles underlying mine sampling and valuing pick analysis implements used in sampling general methods of sampling precautions necessary in sampling geological factors in sampling and valuation churn drilling as applied in sampling handling of samples preparation of samples for assay assaying of samples estimation of ore ore in sight calculation of profits amortization of capital writing reports salting prospects special cases and a chapter on the sampling of placer deposits by chester wells purington |