In the previous discussion the fact was established that the work done by a ball when it strikes at the end of its parabolic path
Assaying for ruthenium, rhodium, palladium, silver, osmium, iridium, platinum, gold is performed by fire assay. This ancient form of quantitative chemical analysis by which metals
Testing Plant Equipment: In order to determine, among other things, the operating conditions of the ball-mill when working on this rock, a test mill of about
Solution mining followed by solvent extraction-electrowinning (SX-EW) is one possible way to economically extract copper from ore bodies which cannot otherwise be profitably exploited. Published
During the last ten years great strides have been made, on the Mesabi range, in the practice of beneficiating low grade iron ore material. By
The early mining of iron ore in Minnesota was carried on with the most primitive kind of tools. The pioneers used only such equipment as
The general object of the investigations has been to extend the use of welding in the construction of merchant ships and, specifically, to provide a
In a previous article preliminary experiments were described, indicating the possibilities of a quantitative spectroscopic method for the determination of small amounts of lead in
The following may be said to be essential characteristics of a furnace for determining the melting point of refractories: It should be capable of easily
The object of this paper is to discuss the factors and conditions that affect the observed values of the melting points of refractory materials and