The exploration of deposits of the metals will never become an exact science. There will always be an element of uncertainty in prospecting and developing
I am sure we are indebted to Prof. Hayward for his addition to our knowledge of the influence of sulphur on steel. As he has
The four nomograms presented in this method were designed to simplify and make more, rapid the calculations connected with the compression and transmission of air. The
The experimental work on the oxidized copper ore at the New Cornelia mine at Ajo, Ariz., ended on Jan. 12, 1916. On that date final
A 2,000-ton Copper Leaching plant for the treatment of the accumulated copper concentrator tailing was built and put into operation. During the experimental period, the
The varying physical character and large extent of the Broken Hill lode necessarily involve the employment of a variety of underground methods. The lode had
The system of stoping as practiced was eminently satisfactory to supplement the steam-shovel operations without injuring the ore reserves of the property through a mixing
In this paper, it is proposed to outline a method for the determination of melting points of those metals and alloys having high fusion temperatures.
Several years ago the writer was connected with the Mint and Assay Service of the Federal Government as Assistant Assayer at the Salt Lake Assay
Experiments on a Porphyry Copper Ore: This research was done partly in the non-ferrous laboratory of the Department of Metallurgy of Columbia University, under the direction of