Annual Report of the Board of Regents of the Smithsonian InstitutionThe Institution, 1898 |
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Side 129
... carbon and silicon , unknown before the electric furnace gave it birth . Sand and coke are the raw substances for its production , and these are acted upon by the excessively high heat necessary to form the new product , already in ...
... carbon and silicon , unknown before the electric furnace gave it birth . Sand and coke are the raw substances for its production , and these are acted upon by the excessively high heat necessary to form the new product , already in ...
Side 130
... carbon , and lime are mixed and charged into a furnace in which an enormous electric arc is kept going . The carbons in an ordinary arc lamp are usually less than one - half inch in diameter , or they have a section of less than one ...
... carbon , and lime are mixed and charged into a furnace in which an enormous electric arc is kept going . The carbons in an ordinary arc lamp are usually less than one - half inch in diameter , or they have a section of less than one ...
Side 132
... carbon blocks in place of metal " brushes " used with the offending commutators . The " carbon brush " thence- forth became almost as essential to the railway - motor machinery as the carbon stick is to an arc lamp and did more than ...
... carbon blocks in place of metal " brushes " used with the offending commutators . The " carbon brush " thence- forth became almost as essential to the railway - motor machinery as the carbon stick is to an arc lamp and did more than ...
Side 138
... carbon bisulphide , and various other liquids investigated proved very transmissible . I could not find that hydrogen was more transmissible than air . The fluoresence was visible behind plates of copper , silver , lead , gold , and ...
... carbon bisulphide , and various other liquids investigated proved very transmissible . I could not find that hydrogen was more transmissible than air . The fluoresence was visible behind plates of copper , silver , lead , gold , and ...
Side 139
... carbon bisulphide in mica prisms of 30 degrees refracting angle showed no deviation either when observations were made with the fluorescent screen or with the photographic plate . For comparison , the deviation of light rays was ...
... carbon bisulphide in mica prisms of 30 degrees refracting angle showed no deviation either when observations were made with the fluorescent screen or with the photographic plate . For comparison , the deviation of light rays was ...
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Annual Report of the Board of Regents of the Smithsonian Institution Smithsonian Institution. Board of Regents Uten tilgangsbegrensning - 1915 |
Annual Report of the Board of Regents of the Smithsonian Institution Smithsonian Institution. Board of Regents Uten tilgangsbegrensning - 1901 |
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12 months acid Aerophile American animals Antarctic apparatus appear appropriation argon ascending atomic weight Balance July balloon birds body building Bureau carbon cathode rays clerk collection color Congress continued Crater Lake diamond direction earth electric ending June 30 ether waves expenditure experiments fact feet flakes fluorescent fluoride geological graphite heat helium hydrofluoric acid hydrogen important incandescent increase Indians interest investigation June 30 kites laborer lake larvæ lava less light material ment meters method Mount Mazama National Museum nature observations Observatory obtained ocean pass photograph plants plate platinum pottery present pressure produced Pueblo Viejo radiation Regents regions rock ruins salaries scientific scyphistoma Secretary seems Smithsonian Institution Smithsonian Report soaring species specimens stone surface Swastika temperature tion totem tube United Walter Fewkes wind X-rays Zoological Park
Populære avsnitt
Side 103 - Our day of dependence, our long apprenticeship to the learning of other lands, draws to a close. The millions that around us are rushing into life cannot always be fed on the sere remains of foreign harvests.
Side x - Washington, during the time for which they shall hold their respective offices ; three members of the Senate, and three members of the House of Representatives, together with six other persons, other than members of Congress, two of whom shall be...
Side 99 - Promote, then, as an object of primary importance, institutions for the general diffusion of knowledge. In proportion as the structure of a government gives force to public opinion, it is essential that public opinion should be enlightened.
Side xlvii - ... subject to such regulations for the security of the revenue and for the collection of import duties as the Secretary of the Treasury shall prescribe: Provided, That all such articles, when sold or withdrawn for consumption...
Side x - Institution, to be composed of the VicePresident, the Chief- Justice of the United States [and the Governor of the District of Columbia], three members of the Senate, and three members of the House of Representatives, together with six other persons, other than members of Congress, two of whom shall be resident in the city of Washington...
Side 47 - For expenses of the system of international exchanges between the United States and foreign countries, under the direction of the Smithsonian Institution, including salaries or compensation of all necessary employees, and the purchase of necessary books and periodicals, $32,000.
Side 24 - In these almost solid masses, they darted forward in undulating and angular lines, descended and swept close over the earth with inconceivable velocity, mounted perpendicularly so as to resemble a vast column, and, when high, were seen wheeling and twisting within their continued lines, which then resembled the coils of a gigantic serpent Before sunset I reached Louisville, distant from Hardensburgh fiftyfive miles.
Side 461 - ... animals are painted by nature darkest on those parts which tend to be most lighted by the sky's light,
Side 333 - It seems, therefore, on the whole most probable that the sun has not illuminated the earth for 100,000,000 years, and almost certain that he has not done so for 500,000,000 years. As for the future, we may say, with equal certainty, that inhabitants of the earth cannot continue to enjoy the light and heat essential to their life for many million years longer unless sources now unknown to us are prepared in the great storehouse of creation.
Side 24 - In the autumn of 1813, I left my house at Henderson, on the banks of the Ohio, on my way to Louisville. In passing over the Barrens a few miles beyond...