The Mineral Industry, Volume 16

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Scientific Publishing Company, 1908 - Mining industry and finance

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Page 798 - The first state of pronounced alteration is the disintegration of the firm rock into a mass of hard angular fragments, varying in size from that of a bean to that of a human fist, which apparently do not readily disintegrate on exposure to the weather. The second stage of alteration, due to further weathering, yields a compact mass, the so-called " green ground," showing various shades of light olive-green, and often bluish in tint when moist, but becoming yellowish on drying.
Page 162 - CONCRETE AND REINFORCED CONCRETE. ORGANIZATION. The members of the special committees on concrete and reinforced concrete of the American Society of Civil Engineers, the American Society for Testing Materials, the American Railway Engineering...
Page 2 - Gold — 5, 10, 20, 50, and 100 francs ; silver — -5 francs. Turkey Gold Piaster .04,4 Gold — 25, 50, 100, 200, and 500 piasters.
Page 798 - The rock is evidently an igneous intrusive, which probably welled up in comparative quiet, and solidified not far from the surface. It is therefore in no sense a volcanic breccia, due to explosive eruptions, as are most of the South African occurrences. Chemically and mineralogically, however, it much resembles the South African rock, although there are certain points of difference — notably the absence of inclusions. Peridotites are generally prone to alteration by weathering. In this instance...
Page 160 - ... infringers of the patents above referred to will be rigorously prosecuted. Nearly 70 per cent, of the output of the portland cement industry in this country is already represented by the association, this being double the annual production in Great Britain, the pioneer portland cement manufacturing country, equal to the combined output of England and France, and in excess of that of Germany.
Page 750 - The year just closed was a very prosperous one in the petroleum fields of Illinois. The area was extended rapidly to the southeast, many gaps were filled in, new and lower sands were tapped, additional pipe- lines were laid, a new refinery was built and the output was phenomenal. At the close of...
Page 1 - Gold: 6, 10, 20, 50, and 100 drachmas. Silver: 5 drachmas. Gold: 1. 2, 5, and 10 gourdes. Silver: gourde and divisions. Gold: sovereign (pound sterling). Silver: rupee and divisions. Gold: 5, 10, 20, 50, and 100 lire. Silver: 5 lire.
Page 453 - CONCLUSION. A careful reading of the foregoing pages will show that no claim has been made that ground feldspar is an efficient substitute, under all circumstances, for potash salts. The effort has been to present all the evidence which could be collected, both for and against the use of ground feldspar as a fertilizer. The question is still open, and systematic and long-continued experimentation is the only possible method of obtaining conclusive information on the subject. The evidence...
Page 1 - Gold: condor ($9.647) and double condor. Silver: peso. Gold: 10 and 20 crowns. Gold: 10 sucres ($4.8665). Silver: Sucre and divisions. Gold: pound (100 piasters). 5, 10, 20, and 50 piasters. Silver: 1, 2, 5, 10. and 20 piasters. Gold: 20 marks ($3.859). 10 marks ($1.93). Gold: 5, 10, 20. 50. and 100 francs.
Page 934 - The natural silicates precipitate the metals from solutions of salts, while at the same time the bases of the silicates are dissolved in quantities nearly equivalent to the precipitated metals. The bases most commonly replacing the metals in these processes are potassium, sodium, magnesium, and calcium. Where exact equivalence is wanting, it is attributable either to solubility of the mineral in pure water or to the precipitation of basic salts. The metals are precipitated as hydroxides or basic...

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