The American Journal of Science and ArtsS. Converse, 1856 |
من داخل الكتاب
النتائج 1-5 من 94
الصفحة 44
... considered as a factory of electrical power , just as a charged and ignited furnace is a factory of heat , and similarly in both cases the rapidity with which the fuel is consumed , and the steadiness of action , will depend on the ...
... considered as a factory of electrical power , just as a charged and ignited furnace is a factory of heat , and similarly in both cases the rapidity with which the fuel is consumed , and the steadiness of action , will depend on the ...
الصفحة 53
... considered as incompetent to pro- duce the effect . But that the gas resists is indisputable , and that it adheres to the conducting plate is equally indisputable , for we know that the very dust of the fields attracts and condenses the ...
... considered as incompetent to pro- duce the effect . But that the gas resists is indisputable , and that it adheres to the conducting plate is equally indisputable , for we know that the very dust of the fields attracts and condenses the ...
الصفحة 54
... considered , it must appear that it is the attraction which makes the determination . In the first place the deposition is nothing when the proportion of sulphate of zinc about the plate is small in comparison to the sulphate of ...
... considered , it must appear that it is the attraction which makes the determination . In the first place the deposition is nothing when the proportion of sulphate of zinc about the plate is small in comparison to the sulphate of ...
الصفحة 56
... considered as the standing miracle of electricity , and the unanswerable argument against the chemical theory of electrical excitation , that a battery will work in a neutral solu- tion of sulphate of zinc , and deposit zinc on the ...
... considered as the standing miracle of electricity , and the unanswerable argument against the chemical theory of electrical excitation , that a battery will work in a neutral solu- tion of sulphate of zinc , and deposit zinc on the ...
الصفحة 62
... considered as the inferior - leaf formation . The same occurs in Frostia , which preys upon the branches of arbores- cent Leguminose , and which resembles a mere flower so much that one might doubt whether it is merely a monstrous ...
... considered as the inferior - leaf formation . The same occurs in Frostia , which preys upon the branches of arbores- cent Leguminose , and which resembles a mere flower so much that one might doubt whether it is merely a monstrous ...
المحتوى
1 | |
10 | |
22 | |
28 | |
37 | |
43 | |
58 | |
80 | |
313 | |
314 | |
339 | |
356 | |
359 | |
365 | |
377 | |
386 | |
96 | |
103 | |
119 | |
125 | |
134 | |
149 | |
153 | |
164 | |
172 | |
189 | |
196 | |
204 | |
213 | |
237 | |
252 | |
262 | |
268 | |
282 | |
290 | |
305 | |
399 | |
405 | |
411 | |
422 | |
429 | |
439 | |
452 | |
1 | |
9 | |
30 | |
38 | |
49 | |
67 | |
102 | |
391 | |
397 | |
405 | |
415 | |
438 | |
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...