The use of stone as a building material in relatively large blocks is recorded in ancient historical records but only within the past 200 years
The term “clay” is applied usually to certain earthy rocks whose most prominent property is that of plasticity when wet. This permits them to be
The minerals that collectively are known as chromite form an isomorphous series of the general formula (Mg,Fe)O. (Cr,Al,Fe)2O3. So wide is the range in chemical
Borax a sodium borate and the principal sodium salt of boric acid, has been surrounded with romance and with a certain amount of mystery. Its
The term “bleaching clay” or “bleaching earth,” as used in the oil industries, refers to clays that in their natural state, or after chemical or
Since the end of World War II interest has been increasing in the use of shaped charges in the mining industry and in other industries
Bauxite is known mainly as the ore from which aluminum is smelted but it has large use also in the manufacture of artificial abrasives and
Recognition of the benefits to be gained from the continuous casting of molten steel into finished or semifinished products has been given by scientific minds
Specimens A, B, and C, of 0.040 in. diameter commercial molybdenum wire (Lot FW 13-40) were heat treated in the vacuum furnace. Internal friction studies
Beneficiation of the manganese oxide ores at Three Kids Mine near Henderson, Nev., has evolved over a period of years. Commercial application of the process