Bibliography of North American Geology for 1918 with Subject IndexU.S. Government Printing Office, 1919 - 148 Seiten |
Andere Ausgaben - Alle anzeigen
Bibliography of North American Geology for 1918, with Subject Index John Milton Nickles,Geological Survey (U S ) Keine Leseprobe verfügbar - 2015 |
Häufige Begriffe und Wortgruppen
Acad acetate added alcohol alkali alumina aluminum ammonia ammonium amount average barium blast boiling Branson Bull calcium carbon dioxide Carboniferous cent Chem Chemie chloride chromium cited cited__ Clark cm.³ color colorimetric constituents containing County Creek Cretaceous crucible deposits Depth determination Devonian dilute dish dissolved dolomite error evaporated feet ferric ferrous iron figs filter filtrate flask flow fluorine footnote formation fusion Geology glass Gooch gram heat hydrochloric acid hydrofluoric acid hydrogen sulphide ignited Jour Kansas limestone magnesium manganese method minerals Mississippian Moore and Haynes nitric acid Ordovician oxalate oxide paper Pennsylvanian Permian phosphorus placers platinum Porcupine potassium powder pre-Cambrian precipitate present reagent Reger and Teets Rept residue rock analysis salt sandstone separation shale silica Silurian sodium carbonate soluble solution sulphate sulphuric acid Survey temperature Tertiary Texas tion titanium titration tube U. S. Geol Valley vanadium washed weight Wyoming Zeitschr zirconium
Beliebte Passagen
Seite 89 - Orstrand of the United States Geological Survey. Some of his observations have been published (Discussion of the Records of some very deep wells in the Appalachian Oil Fields, etc., by IC White. State Geologist, West Virginia, and CE van Orstrand, 1918; IC White, West Virginia's Second Deepest Well of the World, Ohio Gas and Oil Man's Journal, September, 1919).
Seite 19 - PP 28. The superior analyses of igneous rocks from Roth's tabellen, 1869 to 1884, arranged according to the quantitative system of classification, by HS Washington.
Seite 21 - The specimens were taken and analyzed at widely separated times and by different persons, it is true, but they were unquestionably from the same rock mass, in which, however much the relative proportions of the different mineral constituents might vary within certain limits, there can be no reason to doubt the general distribution of all the elements shown by the second analysis.
Seite 244 - OF SOLUBLE SILICA. Very often in treatment by acids silica is separated in gelatinous or granular form mixed with the unattacked minerals, and it becomes necessary to remove or estimate this silica, or else to discriminate between soluble and insoluble silica already existing together. Usually a boiling solution of sodium carbonate has been employed for this purpose, though the caustic alkalies have found advocates.
Seite 86 - Across the uppermost ring there is an arrangement of stout platinum wire (S, fig. 17), forming at the center of the ring a secure seat for the upturned flange of the crucible proper. Both rings and burner can be clamped firmly at any height. The rock powder, having been placed in the cylindrical crucible (C, fig.
Seite 185 - ... carbonate, etc., and the solution is evaporated to approximate dryness. Care should be taken to avoid overrunning neutrality, because of the reducing action of the nitrous acid set free from the nitrite produced during fusion, but when chromium is present it has been my experience that some of this will invariably be retained by the precipitated silica and alumina, though only in one case have I observed a retention of vanadium, it being then large. The use...
Seite 181 - GRAVIMETRIC METHOD. Having obtained chromium in solution as chromate and free from all else but a little alumina, as at the conclusion of the preceding section on phosphorus, proceed as follows: Concentrate if necessary and add fresh ammonium sulphide, or introduce hydrogen sulphide. The chromium is reduced and appears as a precipitate of sesquioxide mixed with the rest of the alumina. This precipitate is now treated according to H.
Seite 163 - After expulsion of hydrogen sulphide by boiling, the permanganate is added gradually to the hot solution contained in a large beaker or flask. A vigorous reaction ensues. When a permanent brown precipitate of manganic hydrate appears, the tartaric acid has been fully broken up, and the precipitated manganese is to be redissolved by a few drops of ammonium bisulphite or of sulphurous acid solution. Ammonia is then added in slight excess, followed at once by acetic acid in considerable excess, and...
Seite 159 - One of the rectangular glasses (fig. 5, p. 32) being filled with the solution to be tested, 10 cm.3 of the diluted standard are run into the other from a burette, and water is added from a second burette until there is no distinction as to color. A second and a third portion of the standard can be run in and diluted and the mean of several determinations struck, when a simple calculation gives the percentage of TiO2 in the rock, the amounts in the two- solutions being directly as their volumes.
Seite 195 - ... then poured in until the tube is about three-fourths filled. Carbon dioxide is then introduced, from a generator which has been in active operation for some time, through a narrow glass tube drawn out of the same kind of glass as that of which the decomposing tube consists. In a few moments the air is expelled, and the small tube is then sealed into the large one over the blast lamp without interrupting the gas current until the very last instant, when to prolong it would perhaps cause a blowing...