Contributions to Chemistry and Mineralogy from the Laboratory of the United States Geological SurveyU.S. Government Printing Office, 1900 - 166 strani |
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Stran 31
Frank Wigglesworth Clarke. Between the magnesium tourmalines and the iron tourmalines the closest analogy exists , and the identity of type is absolute . Taking , except when otherwise specified , the analyses by Riggs , all the iron ...
Frank Wigglesworth Clarke. Between the magnesium tourmalines and the iron tourmalines the closest analogy exists , and the identity of type is absolute . Taking , except when otherwise specified , the analyses by Riggs , all the iron ...
Stran 33
... iron , and manganese , but the ratio Al , Si , is very clear . The green tourmalines are all lower in alumina , and range downward toward the iron end of the series ; and like the latter are representable as mixtures of the fol- lowing ...
... iron , and manganese , but the ratio Al , Si , is very clear . The green tourmalines are all lower in alumina , and range downward toward the iron end of the series ; and like the latter are representable as mixtures of the fol- lowing ...
Stran 35
... iron tourmalines . Under either system of formulation the existence in tourmaline of alkali - free salts must be assumed . One further possible advantage in the proposed formulæ remains to be pointed out . All of the chemists who of ...
... iron tourmalines . Under either system of formulation the existence in tourmaline of alkali - free salts must be assumed . One further possible advantage in the proposed formulæ remains to be pointed out . All of the chemists who of ...
Stran 40
... iron ore carrying phosphorus and vanadium , and fused with 20 grams of sodium carbonate and 3 grams sodium nitrate . The aqueous extract , after reduction of manganese by methyl or ethyl alcohol , was nearly neutralized by nitric acid ...
... iron ore carrying phosphorus and vanadium , and fused with 20 grams of sodium carbonate and 3 grams sodium nitrate . The aqueous extract , after reduction of manganese by methyl or ethyl alcohol , was nearly neutralized by nitric acid ...
Stran 41
... iron ore .. 7.03 7.18 7.20 7.25 7.21 II . Five grams iron ore 2.99 3.08 3.13 III . Two grams silicate 1.6 1.53 1.57 1.59 When the percentage of chromic oxide in an ore or mineral is more than about 0.2 per cent , and vanadium has not ...
... iron ore .. 7.03 7.18 7.20 7.25 7.21 II . Five grams iron ore 2.99 3.08 3.13 III . Two grams silicate 1.6 1.53 1.57 1.59 When the percentage of chromic oxide in an ore or mineral is more than about 0.2 per cent , and vanadium has not ...
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Pogosti izrazi in povedi
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
Priljubljeni odlomki
Stran 11 - 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...
Stran 118 - 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.
Stran 25 - 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.
Stran 119 - 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...
Stran 94 - Situate, lying, and being in that part of America called Virginia, from the point of land called Cape or Point Comfort, all along the...
Stran 25 - 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...
Stran 58 - York for the time being, and all others whom it may concern, are to take Notice and Govern themselves accordingly.
Stran 70 - 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...
Stran 25 - 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...
Stran 108 - 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.