The American Journal of Science and ArtsS. Converse, 1856 |
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النتائج 1-5 من 100
الصفحة 122
... color and more or less porous , very hard and of considerable den- sity . The surface has a coppery reflection . In fracture , it has a uni- form aspect , a crystalline texture , and a greenish and brilliant metallic reflection . It now ...
... color and more or less porous , very hard and of considerable den- sity . The surface has a coppery reflection . In fracture , it has a uni- form aspect , a crystalline texture , and a greenish and brilliant metallic reflection . It now ...
الصفحة 123
... color , and without hard fragments . It is well to use a course seive to remove the stony matters present , retaining them to be lixiviated apart , taking care to reject the insoluble residue . The sifted powder forms with water a lye ...
... color , and without hard fragments . It is well to use a course seive to remove the stony matters present , retaining them to be lixiviated apart , taking care to reject the insoluble residue . The sifted powder forms with water a lye ...
الصفحة 125
... color A , and one ray or bundle of rays , the extraordinary ray , is polar- ized perpendicular to the axis with the color B. Inference . The vibrations are either perpendicular to the plane of polarization or in this plane . Hypothesis ...
... color A , and one ray or bundle of rays , the extraordinary ray , is polar- ized perpendicular to the axis with the color B. Inference . The vibrations are either perpendicular to the plane of polarization or in this plane . Hypothesis ...
الصفحة 126
... color B , that is a wave length , is in all azimuths united to one direction of vibration . 6. To one plane of polarization belongs one direction of vibration . To one color A or wave length belongs only one direction of vi- bration ...
... color B , that is a wave length , is in all azimuths united to one direction of vibration . 6. To one plane of polarization belongs one direction of vibration . To one color A or wave length belongs only one direction of vi- bration ...
الصفحة 127
... color or the same wave length . 12. In the direction of the axis we do not see the color B because the direction of vibration belonging to this color has a longitudinal po- sition . 13. The constant ( or limiting ) tones of color A and ...
... color or the same wave length . 12. In the direction of the axis we do not see the color B because the direction of vibration belonging to this color has a longitudinal po- sition . 13. The constant ( or limiting ) tones of color A and ...
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طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
acid alcohol alumina aluminium ammonia analysis angle appears auroral auroral light axis carbon carbonic acid Carboniferous chlorid co-tidal coal coast color colorless contains cryolite crystalline crystals curve dark deposits Devonian diameter direction distance earth ecliptic edge experiments feet formation fossil genus geological glass heat height horizon hour inches iron Kenngott Kilauea Lake latitude lava light lime limestone lower mass mean metal miles mineral mountains nearly nitric acid observations obtained occur Old Red Sandstone oxyd oxygen paper pass plane plants plate Pogg portion present Prof quantity rain remarkable ring river rocks route salt sandstone SECOND SERIES seen selenium shells side siliceous Silurian silver soda sodium solution species specimens stream sulphate sulphuric sulphuric acid surface temperature tion upper valley vapors vertical whole winds yellow zinc zodiacal light
مقاطع مشهورة
الصفحة 266 - ... a vacuum, without the mediation of anything else, by and through which their action and force may be conveyed from one to another, is to me so great an absurdity, that I believe no man who has in philosophical matters a competent faculty of thinking, can ever fall into it. Gravity must be caused by an agent acting constantly according to certain laws ; but whether this agent be material or immaterial, I have left to the consideration of my readers.
الصفحة 266 - That gravity should be innate, inherent and essential to matter, so that one body may act upon another at a distance through a vacuum, without the mediation of anything else, by and through which their action and force may be conveyed from one to another, is to me so great an absurdity, that I believe no man who has in philosophical matters a competent faculty of thinking, can ever fall into it.
الصفحة 408 - ... which will thus wash and cleanse the metal most thoroughly from the silica and other earthy bases which are combined with the crude iron, while the sulphur and other volatile matters which cling so tenaciously to iron at ordinary temperatures are driven off, the sulphur combining with the oxygen and forming sulphurous acid gas. The loss in weight of crude iron during its conversion into an ingot of malleable iron was found on a mean...
الصفحة 137 - Bryologia Britannica Containing the Mosses of Great Britain and Ireland systematically arranged and described according to the Method of Bruch and Schimper; with 61 illustrative Plates. Being a New Edition, enlarged and altered, of the Miucotogift Britannica of Messrs. Hooker and Taylor.
الصفحة 411 - At that stage of the process immediately following the boil, the whole of the crude iron has passed into the condition of cast-steel of ordinary quality ; by the continuation of the process the steel so produced gradually loses its small remaining portion of carbon, and passes successively...
الصفحة 302 - June, 1855. 4to., pp. 70, 16 plates of 139 figures. (S. C. vii.) 73. Publications of Learned Societies and Periodicals in the Library of the Smithsonian Institution. December 31, 1854. Part 1. 1855. 4to., pp.
الصفحة 455 - Gift of the State of New York. 13034, 0. 5. Sixth annual report of the Regents of the University of the State of New York on the condition of the State Cabinet of Natural History, &o.
الصفحة 33 - ... this kind. Some doubt, however, was expressed as to the action of interposed lead, which induced a series of experiments to settle this question, when the remarkable fact was discovered that the yielding and approximately equable pressure of the lead caused the stone to give way at about half the pressure it would sustain without such an interposition.
الصفحة 62 - The cutting off of the chemical ray facilitates the process of germination, and that both in reference to the protrusion of the radicles, and the evolution of the plume...
الصفحة 267 - ... of the planets in different positions with respect to each other and the sun. Moreover, gravitation is not assumed to be a dual power, and in them only as yet have such removals been observed by experiment or conceived by the mind. The second sub-case, or that of a new or another form of power, is also one which has never been imagined by others, in association with the theory of gravity. I made some endeavours, experimentally, to connect gravity with electricity, having this very object in view...