Contributions to Chemistry and Mineralogy from the Laboratory of the United States Geological SurveyU.S. Government Printing Office, 1900 - 166페이지 |
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41개의 결과 중 1 - 5개
40 페이지
... nitric acid and evaporated to secure approximate separation of silica and alumina . As a precautionary measure , since a little chromium is usually carried down , the precipi- tate was ignited , silica was removed by hydrofluoric and ...
... nitric acid and evaporated to secure approximate separation of silica and alumina . As a precautionary measure , since a little chromium is usually carried down , the precipi- tate was ignited , silica was removed by hydrofluoric and ...
47 페이지
... nitric acid and evaporating to near dryness . The washed precipitate was ignited and treated with hydrofluoric and sulphuric acids , the residue fused with sodium carbonate , since it frequently contains a littl chromium , and again ...
... nitric acid and evaporating to near dryness . The washed precipitate was ignited and treated with hydrofluoric and sulphuric acids , the residue fused with sodium carbonate , since it frequently contains a littl chromium , and again ...
48 페이지
... acid , taking up with a few drops of dilute nitric acid , and adding to the solution in a test tube a drop or two of hydrogen per- oxide . In this way positive or negative assurance as to the presence of vanadium is given when the ...
... acid , taking up with a few drops of dilute nitric acid , and adding to the solution in a test tube a drop or two of hydrogen per- oxide . In this way positive or negative assurance as to the presence of vanadium is given when the ...
53 페이지
... nitric acid , the amount to be used having been conveniently ascer- tained by a blank test with exactly 20 grams of sodium carbonate , etc. , and the solution is evaporated to approximate dryness . Care should be taken to avoid ...
... nitric acid , the amount to be used having been conveniently ascer- tained by a blank test with exactly 20 grams of sodium carbonate , etc. , and the solution is evaporated to approximate dryness . Care should be taken to avoid ...
54 페이지
... oxide unnecessary for correcting this acidity . If the alkalinity , as shown by the formation of an unduly large precipitate , should have been too great , it may be reduced by careful addition of nitric acid until an added drop of ...
... oxide unnecessary for correcting this acidity . If the alkalinity , as shown by the formation of an unduly large precipitate , should have been too great , it may be reduced by careful addition of nitric acid until an added drop of ...
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자주 나오는 단어 및 구문
aforesaid analcite Analysis by Hillebrand Analysis by W. F. Andesite apatite augite azimuth biotite boundary line Bull calcite cent chloride CO₂ commissioners Connecticut Contains plagioclase Contains quartz corner County Creek degree of north described dike east epidote feet feldspar forty-ninth parallel gabbro groundmass H. N. Stokes H₂O H₂O above 110 Hampshire Historical diagram hornblende hypersthene intersection Iron post K₂O L. G. Eakins labradorite Lake land longitude magnetite marked Massachusetts meridian middle miles mineral Mississippi Mountain Na,O Na₂O north latitude northwest olivine orthoclase P₂O phenocrysts plagioclase portion precipitate pyroxene quartz record Rhyolite ridge rock rods salt sericite silver silver nitrate SiO2 sodium soluble solution sphene stone monument Territory thence north thence same course thereof TiO2 trace MnO trace trace trace treaty U. S. GEOLOGICAL SURVEY undet United vanadium Vide Virginia W. F. Hillebrand York zircon
인기 인용구
11 페이지 - Superior; thence through Lake Superior northward of the Isles Royal and Phelipeaux, to the Long Lake; thence through the middle of said Long Lake, and the water communication between it and the Lake of the Woods, to the said Lake of the Woods; thence through the said lake to the most northwestern point thereof, and from thence on a due west course to the river Mississippi...
118 페이지 - Moines; thence, down, and along the middle of the main channel of the said river Des Moines, to the mouth of the same, where it empties into the Mississippi river; thence, due east, to the middle of the main channel of the Mississippi river; thence, down, and following the course of the Mississippi river, in the middle of the main channel thereof, to the place of beginning.
25 페이지 - Roxo westward to the degree of longitude 100 west from London and 23 from Washington; then, crossing the said Red River, and running thence, by a line due north, to the river Arkansas; thence, following the course of the southern bank of the Arkansas, to its source, in latitude 42 north; and thence, by that parallel of latitude, to the South Sea.
119 페이지 - Nebraska ; and when admitted as a state or states, the said territory, or any portion of the same, shall be received into the Union with or without slavery, as their constitution may prescribe at the time of their admission...
94 페이지 - Situate, lying, and being in that part of America called Virginia, from the point of land called Cape or Point Comfort, all along the...
25 페이지 - The whole being, as laid down in Melish's map of the United States, published at Philadelphia, improved to the first of January, 1818. But, if the source of the Arkansas River shall be found to fall north or south of latitude 42, then the line shall run from the said source due south or north, as the case may be, till it meets the said parallel of latitude 42, and thence, along the said parallel, to the South Sea...
58 페이지 - York for the time being, and all others whom it may concern, are to take Notice and Govern themselves accordingly.
70 페이지 - Bay, where the said river falleth into the sea; and on the north by the line of the Massachusetts plantation; and on the south by the sea; and in longitude as the line of the Massachusetts colony, running from east to west, that is to say, from the said Narraganset Bay on the east, to the south sea on the west part, with the islands thereunto adjoining...
25 페이지 - Sabine, in the sea, continuing north, along the western bank of that river, to the 32d degree of latitude; thence, by a line due north, to the degree of latitude where it strikes the Rio Roxo of Natchitoches, or Red river; then following the course of the Rio Roxo westward, to the degree of longitude 100 west from London and 23 from Washington; then, crossing the said Red river, and running thence, by a line due north, to the river Arkansas...
108 페이지 - That in all that Territory ceded by France to the United States, under the name of Louisiana, which lies north of Thirty-six degrees and thirty minutes north latitude, not included within the limits of the state contemplated by this act, slavery and involuntary servitude, otherwise than in the punishment of crimes whereof the parties shall have been duly convicted, shall be and is hereby forever prohibited.