Was andere dazu sagen - Rezension schreiben
Es wurden keine Rezensionen gefunden.
Alaska alkali alumina aluminum ammonia ammonium amount analysis andesite anticline barium basalt beds Big Injun sand blast boiling Bullfrog calcite calcium carbon dioxide cent Chem chiseled square chloride color constituents Creek crest crucible dacite deposits determination dilute dish district drilled Dunkard east evaporated fault feet ferric ferrous field Fifth sand filter filtrate fissures flask fluorine formation fusion geology glass gold Goldfield Gordon gram Greene County heat Henry Gannett hydrochloric acid hydrofluoric acid hydrogen ignited iron Jour ledge lime limestone lode magnesium manganese method miles mineral mines Mountain Nineveh oxide Pittsburg Pittsburg coal platinum portion powder precipitate present pyrite quadrangle quartz residue rhyolite rock salt sandstone schist separation shaft shale silica Slate sodium carbonate solution sulphate sulphide sulphuric acid surface Survey syncline thickness tion titanium titration Township tube vanadium vein washed Washington Waynesburg weight
Seite 49 - The instrument should have a stable support, which may be a stone pier, a wooden post, or a good tripod. If a portable tripod is used its legs should be set firmly in the ground. The instrument should be protected from the direct rays of the sun by means of an umbrella or a piece of canvas like a tent fly. It should also be shielded from winds that might jar or twist either it or its support.
Seite 151 - CO2-free air with which to sweep out the apparatus before and after the experiment, and for a slow current during its continuance. The results are very accurate and the determination can be quickly carried out. The manipulations are as follows...
Seite 113 - Ransome. 1906. — pp., 29 pis. PP 55. Ore deposits of the Silver Peak quadrangle, Nevada, by JE Spurr. 1906. 174 pp., 24 pis. B 289. A reconnaissance of the Matanuska coal...
Seite 104 - B 303. Preliminary account of Goldfield, Bullfrog, and other mining districts in southern Nevada, by FL Rausome, with notes on the Manhattan district, by GH Garrey and WH Emmons.
Seite 266 - WS 164. Underground waters of Tennessee and Kentucky west of Tennessee River and of an adjacent area in Illinois, by LC Glenn.
Seite 52 - Friedel b indicates a means for determining the true weight of water lost by minerals behaving like the zeolites, even without collecting the water lost, namely, by driving out of the dehydrated and weighed mineral, under proper precautions, any air it may have absorbed in the process of drying and cooling, and collecting and measuring this air and thus finding its weight, which, added to the apparent loss, gives the true contents in water.
Seite 165 - 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 109 - ... on ignition. If an excess of acetic acid has been used, this is cautiously removed by ammonia. Then a drop or two of solution of ammonium oxalate is added, and the small beaker is set aside for twelve hours if necessary. Almost invariably a small precipitate soon shows itself, which, if fine grained and nonadherent to the glass, may be regarded as pure calcium oxalate; otherwise it contains, or may largely consist of, magnesium oxalate. It is in that case to be collected, ignited, redissolved,...
Seite 82 - Two precipitations by ammonia at boiling heat are usually quite sufficient to separate iron, aluminum, phosphorus, vanadium, chromium, titanium, and zirconium, if all these are present, from nickel, manganese, the alkaline-earth metals, and magnesium, provided ammoniacal salts are present in sufficient quan.tity. This last point is of special importance as regards magnesium, and failure to observe it is doubtless the reason why many old analyses, and sometimes modern ones, show utterly improbable...