Show THE elimination OF WASTE the treatment of low grade ores in the immediate locality of production and the consequent marketing of a high grade product is a question and problem that is now being most seriously considered by mine owners and metallurgists and results in many instances are far beyond the most sanguine expectations of those who are interested te rested in this question for the elimination of waste and the production of an almost pure metallic substance must necessarily lead to economy of operation and specially especially so when the question of transportation is concerned conce arned while the rapid strides being made in ore reduction will and ana has made mad available an almost untold tonnage of hith hh erto arto waste material of low metal meta 1 y haip al u cora which can now or soon can be commer m J bially treated on a most profitable scale I 1 the almost of possibilities of t the he cyanide process is resulting in the handling of vast measures of refractory 3 31 gold bearing ores of extremely low grade t and many characters of 0 res ores can now be handled profeta profitably bly by this method that were considered as being untreatable less than ten years ago while almost a miracle has been accomplished by the flotation tern tem and various leaching methods all of f which means that the big money of the future to be made in mining will come from the enormous deposits of low grade material which never before could be handled economically profitably and on a large scale in this isue sue some of the metallurgical questions at issue in advanced milling methods are most ably handled by writers who are thoroughly familiar with their subjects and we are confident that the majority of our readers will be interested in them |