The School of Mines Quarterly, Volumen27Columbia University, 1906 |
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Página 40
... structure of quinine less thoroughly investi- gated than that of cinchonine . Indeed the structure of cinchonine has been worked out with much pains and several graphic formulæ have been proposed for it . Much has been done on quinine ...
... structure of quinine less thoroughly investi- gated than that of cinchonine . Indeed the structure of cinchonine has been worked out with much pains and several graphic formulæ have been proposed for it . Much has been done on quinine ...
Página 43
... structure of the quinine molecule is furnished by the products of its oxidation by various methods . The action of potassium permanganate in alkaline and in acid solution , both hot and cold , of chromic acid , and of nitric acid has ...
... structure of the quinine molecule is furnished by the products of its oxidation by various methods . The action of potassium permanganate in alkaline and in acid solution , both hot and cold , of chromic acid , and of nitric acid has ...
Página 45
... structural formula of cincholoiponic acid is not firmly es- tablished , but the above formula is a possible and a probable one ( 62 ) . We believe it is a secondary base because it forms nitro- samine , acetyl , and benzoyl derivatives ...
... structural formula of cincholoiponic acid is not firmly es- tablished , but the above formula is a possible and a probable one ( 62 ) . We believe it is a secondary base because it forms nitro- samine , acetyl , and benzoyl derivatives ...
Página 49
... still further proof of the structure of quinine , especially of the second half of the molecule . Phosphorus pentachloride acting upon quinine hydrochloride in chloroformic solution replaces THE CONSTITUTION OF QUININE . 49.
... still further proof of the structure of quinine , especially of the second half of the molecule . Phosphorus pentachloride acting upon quinine hydrochloride in chloroformic solution replaces THE CONSTITUTION OF QUININE . 49.
Página 140
... structures ; ( 4 ) coprolites . 1. Actual Remains . - Generally only the hard parts of animals will be preserved but ... structure was hollow , as in the case of shells , both external and in- ternal molds ( the latter often called casts ) ...
... structures ; ( 4 ) coprolites . 1. Actual Remains . - Generally only the hard parts of animals will be preserved but ... structure was hollow , as in the case of shells , both external and in- ternal molds ( the latter often called casts ) ...
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Términos y frases comunes
acid amount anticlinal astrorhizæ atoms Bagasse beds Berzelius boiling branches Bright interference colors Brix bromoform cage Cambric cane carbon cent Chem chemical individual chemist chloride columella combining weights compound connected copper corals costæ crystals deposits developed Devonic diameter dilute Dissolve dyke electric elements elongation engine Eocenic fact fault filter fissure Foraminifera formation fossils franklinite gases Geol Graptolites Hall heat HNO3 hundred feet hydrogen hydrothecæ idea igneous investigation juice laminæ limestone mamelons Meadow Valley means metal method methylene methylene iodide mineral motor neutral obtained occurs oil of cloves Ordovicic organic chemistry oxidation oxygen Pioche plant plates possible precipitate properties quartzite quinine Raymond and Ely reaction result rock salts septa shaft shale Siluric soluble solution speed steam Stromatoporoids structure substance sugar sulfur in methylene sulphuric surface Surv temperature theory tion tube upper vein vertical volume zinc
Pasajes populares
Página 2 - Mining claims upon veins or lodes of quartz or other rock in place bearing gold, silver, cinnabar, lead, tin, copper, or other valuable deposits...
Página 15 - They belong to the owner of the land and are a part of it, so long as they are on or in it, and are subject to his control; but when they escape, and go into other land, or come under another's control, the title of the former owner is gone.
Página 23 - ... may be found, but only those where the mineral is in sufficient quantity to add to their richness and to justify expenditure for its extraction, and known to be so at the date of the grant. There are vast tracts of country in the mining States which contain precious metals in small quantities, but not to a sufficient extent to justify the expense of their exploitation. It is not to such lands that the term mineral in the sense of this statute is applicable.
Página 23 - The exceptions of mineral lands from preemption and settlement and from grants to States for universities and schools, for the construction of public buildings, and in aid of railroads and other works of internal improvement, are not held to exclude all lands in which minerals may be found, but only those where the mineral is in sufficient quantity to add to their richness and to justify expenditure for its extraction, and known to be so at the date of the grant.
Página 20 - That whatever is recognized as a mineral by the standard authorities on the subject, where the same is found in...
Página 20 - All valuable mineral deposits in lands belonging to the United States, both surveyed and unsurveyed, are hereby declared to be free aiid open to exploration and purchase, and the lands in which they are found to occupation and purchase, by citizens of the United States...
Página 24 - Minerals, crude, or not advanced in value or condition by refining or grinding, or by other process of manufacture, not specially provided for.
Página 18 - When the filtrations are gathered into sufficient volume to have an appreciable value, and to flow in a clearly defined channel, it is generally possible to see it and to avoid diverting it, without serious detriment to the owner of the land through which it flows. But percolations spread in every direction through the earth, and it is impossible to avoid disturbing them without relinquishing the necessary enjoyment of the land.
Página 15 - Certainly, in popular estimation, petroleum is not regarded as a mineral substance any more than is animal or vegetable oil, and it can, indeed, only be so classified in the most general or scientific sense.
Página 13 - The material clearly is a mineral and it is reserved from the grant unless " the nature and context of the deed shows that it was not intended to be included " in the reservation. There is nothing to justify such a finding. The only claim that can be made is that the ledges of rock were so apparent and covered so large a portion of the original 100 acres that the parties could not have referred to them; that to except them would practically destroy the grant. Yet it may equally well be said that...