The Paleozoic Group: The Geology of Ten Counties of Northwestern GeorgiaG.W. Harrison, State printer, 1893 - 406 стор. |
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Загальні терміни та фрази
Alabama alumina aluminum analyses anticlinal Bartow county basin beauxite beds belt black shales brown calcareous matter Cambrian carbonate Cartersville Cave Spring cent cherty Chickamauga CHICKAMAUGA SERIES Coal Measures color conglomerate contain Coosa creek crystalline Dade decay deposits district earthy east eastern side Etowah river extend fault feet Ferric oxide ferruginous Floyd county formation Fort Payne fossil geological Georgia gravel gray hills inches iron KNOX DOLOMITE SERIES Knox series Lafayette layers less lime limestones Lookout mountain lower Magnesia manganese metal metamorphic miles mineral northwestern Georgia occur OOSTANAULA SERIES Oostanaula shales Paleozoic Payne chert Phosphoric acid Pigeon mountain plant food plateau Polk county portion Potash quantities Railway red lands Red Mountain series residual clays Rising Fawn roads Rockmart rocks Sand mountain sandstones sandy shales seam seen Silica slates soil soluble in acid strata streams SUB-CARBONIFEROUS SERIES surface synclinal Taylor's ridge thickness undulations upper valley western whilst Whitfield county
Популярні уривки
Сторінка 231 - ... probably Gibbsite (hydrargillite). The bauxites of Ireland, of the Westerwald, and the Vogelsberg, show by certain external indications their derivation from basalt. The bauxite of the Vogelsberg occurs in scattered lumps or small masses, partly on the surface and partly imbedded in a grayish white to reddish brown clay, which contains also similar masses of basaltic iron ore and fragments of more or less weathered basalt itself. Although the latter was associated intimately with the bauxite,...
Сторінка 240 - For 10o kilograms of iron to be operated on, 200 grams of aluminum are used ( = 0.20 per cent.). The iron is not poured at once from the large ladle, but is allowed to stand until it is orange yellow and a thin film begins to form on the surface. As soon as this occurs the film is removed and the iron is poured. The mold should be kept full. No reason is assigned for this procedure, but it appears that iron containing aluminum is inclined to shrink excessively and that this tendency must be obviated...
Сторінка 364 - ... record; to cause to be preserved in a museum specimens illustrating the geology, mineralogy, soils, plants, valuable woods, and whatever else may be discovered in Georgia of scientific or economic value, and...
Сторінка 363 - July, 1890, and shall hold until removed by the appointing power for inefficiency, incompetency, or misconduct, or until the office is abolished by the General Assembly. The office of the State Geologist shall be at the seat of Government.
Сторінка 240 - The aluminum, in small pieces of *4 or /^ pound weight, is thrown into the ladle during the tapping, shortly after a small quantity of steel has already entered it. The aluminum melts almost instantaneously and diffuses with great rapidity throughout the contents of the ladle. The diffusion seems to be complete, for the writer has never seen the slightest action indicating want of homogeneity of mixture, all of the ingots poured from one ladle being precisely alike so far as the specific action of...
Сторінка 231 - ... specimens still possessed a basaltic (anamesite) structure, which enabled the author to determine the former constituents with more or less certainty. The clays from different points in the district carrying basalt, basaltic iron ore, and bauxite were examined, some of which showed clearly a sedimentary character. Some of the bauxite nodules were a foot and a half in diameter and possessed no characteristic form. They were of an uneven surface, light to dark brown, white, yellowish, and gray...
Сторінка 242 - ... inches. Such bronzes have a specific gravity of about 7.50, and are of a light yellow color. For cylinders to withstand high pressures such bronze is probably the best metal yet known. " ' The 5 to 7 per cent. aluminum bronzes have a specific gravity of...
Сторінка 224 - The position of the beauxite appears to be more or less in pockets and lenticular masses in certain strata, and if workings are ever carried beneath the decayed rocks, the mineral will likely be found in pockets in compact limestone. Indeed, some of the apparent clays may be found to be the soluble aluminous mineral, which is so far as known in Georgia, generally more or less oolitic and concretionary, as are the iron and manganese deposits. The beauxite beds or pockets are less interrupted, and...
Сторінка 243 - ... aluminum, 10 parts iron, and 30 parts copper. " Prof. Robert Austin has discovered a beautiful alloy containing 22 per •cent, aluminum and 78 per cent, gold, having a rich purple color, with ruby tints. " The addition of from 5 per cent, to 15 per cent, aluminum to type metal •composed of 25 per cent, antimony and 75 per cent, lead makes a metal giving sharper castings and much more durable type. " Mr. AH Cowles makes an alloy for electrical purposes consisting of manganese 18 parts, aluminum...
Сторінка 239 - ... soda solution (1 per cent.), besides butter, honey, and preserved fruits. The articles were then cleaned, dried, and weighed, to determine the loss of weight. The results, which fill a large table, showed that in most cases there was absolutely no action and in the few cases where there was a perceptible loss of weight it was so trifling as to be disregarded. To the objection that continued drinking of fluids containing a small quantity of alumina would eventually be dangerous, the author points...