Proceedings of the American Academy of Arts and Sciences, Volumen30Metcalf and Company, 1895 Vol. 12 (from May 1876 to May 1877) includes: Researches in telephony / by A. Graham Bell. |
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Página 9
... crystal- lization was lost wholly or in part at temperatures above -5 ° Cent . , requiring the salt to be handled in a room below that temperature . In dealing with these new compounds the necessity for cold weather is even greater than ...
... crystal- lization was lost wholly or in part at temperatures above -5 ° Cent . , requiring the salt to be handled in a room below that temperature . In dealing with these new compounds the necessity for cold weather is even greater than ...
Página 11
... crystals were removed in the cold room , crushed in a mortar , hastily rubbed between filter papers and placed in glass - stoppered weighing bottles . Of necessity this operation re- quired considerable dexterity to prevent any change ...
... crystals were removed in the cold room , crushed in a mortar , hastily rubbed between filter papers and placed in glass - stoppered weighing bottles . Of necessity this operation re- quired considerable dexterity to prevent any change ...
Página 13
... crystals . There was no case of a complex crystalline precipitate , for all three com- pounds are most perfectly crystalline , and the only sources of contam- ination are occlusions of mother liquor and imperfect drying due to the haste ...
... crystals . There was no case of a complex crystalline precipitate , for all three com- pounds are most perfectly crystalline , and the only sources of contam- ination are occlusions of mother liquor and imperfect drying due to the haste ...
Página 14
... crystals , often exceeding half an inch in length . Aside from the fact that the polariscope showed no interference figure , no crystallographic study of the salt could be made owing to its unstable nature . This salt , precisely as its ...
... crystals , often exceeding half an inch in length . Aside from the fact that the polariscope showed no interference figure , no crystallographic study of the salt could be made owing to its unstable nature . This salt , precisely as its ...
Página 15
American Academy of Arts and Sciences. crystals gave no interference figure with the polariscope . This salt , as the others , loses all its water of crystallization and antimonious bromide in a desiccator over sulphuric acid , leaving a ...
American Academy of Arts and Sciences. crystals gave no interference figure with the polariscope . This salt , as the others , loses all its water of crystallization and antimonious bromide in a desiccator over sulphuric acid , leaving a ...
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Términos y frases comunes
Academy alcohol ammonia antennæ antimony appendage aqueous atoms basal benzol blastodermic vesicle body boiling Boston Cambridge carbonic carina cells CEUTHOPHILUS Chem Chemical Chemistry chloranil chloroform color compound crystalline crystals dichlordiethoxyquinone dichlordiphenoxyquinone dilute dissolved distal dried ectoderm embryos ether ethoxy filtered fore femora formed formula fulminate fuscous genicular spine germinal disk glacial acetic acid gram gram gave gram of argentic H₂O half as long heat hemiacetal hind femora Hind tibiæ hydrobromic acid hydrochloric acid hydrogen inner carina insoluble laboratory length less liquid longer luteous malonic ester method methyl Middle femora molecule nearly nitromethane obtained outer carina ovipositor oxide perithecium phenylate Plate posterior precipitate Professor Cooke pronotum quinone saponification Section silver slender sodic sodic ethylate sodic hydrate sodium sodium salt soluble solution species specimen spurs stout strontic bromide substance gave sulphuric acid tapering temperature tibia tibial depth tion tube twice as long
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Página 434 - Like the corresponding methyl compound the dichlordiethoxyquinone diethylhemiacetal has acid properties forming with sodic hydrate a sodium salt. It shows toward sodic hydrate a stability in marked contrast to its susceptibility to the action of dilute acids, as it is necessary to boil it with a strong solution of sodic hydrate in order to saponify it to chloranilic acid. The sodium salt of the diethylhemiacetal is white and crystalline, readily soluble in water, slightly soluble in alcohol, and...
Página 219 - ... the equilibrium is obtained. All the facts are shown to be in accordance with this hypothesis, and a ready explanation is afforded by it of a number of phenomena which are to be found in the older works on electricity, but which have until this time remained unexplained.
Página 320 - 84. A Contribution to the Embryography of Osseous Fishes, with Special Reference to the Development of the Cod (Gadus morrhua).
Página 219 - The discharge, whatever may be its nature, is not correctly represented (employing for simplicity the theory of Franklin) by the single transfer of an imponderable fluid from one side of the jar to the other...
Página 611 - OF THE PRESIDENT. 1. It shall be the duty of the President, and, in his absence, of the senior...
Página 571 - A Course of Instruction in the Elements of the Art and Science of War, for the Use of the Cadets of the United States Military Academy, West Point, NY 12mo, cloth $1 .75 Field Fortifications.
Página 507 - ... following letters : from the Scientific Alliance of New York, requesting the cooperation of the Academy in the endeavor to obtain a reduction of postage rates on natural history specimens ; from the Royal Society of New South Wales, offering its medal and twenty-five pounds for the best communication containing the results of original researches on a series of specified topics ; from the Imperial Russian Geographical Society, enclosing a copy of a pamphlet " Respecting the Necessity of an International...