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Excerpt from London and Edinburgh Philosophical Magazine and Journal of Science, Vol. 5: New and United Series of the Philosophical Magazine and Journal of Science, July December, 1834 Having observed, whilst I was using my dipping-needle with its magnetic deflector (noticed in No. 20, Third Series of the London and Edinburgh Philosophical Magazine: vol. iv. p. 81), that the ratio of the magnetic forces was not uniform, I was induced to enter upon a series of experiments for the purpose of investigating these forces. Of the various methods I adopted, I think it may be sufficient for me to describe that only which seemed on the whole to be most satisfactory and decisive. To the extremity of a horizontal beam, delicately balanced on knife-edges, a magnetic bar was attached, with its axis in a vertical direction, and a counterpoise was suspended from the other end of the beam. Immediately under the attached or suspended magnet, and in the same vertical line, another similar magnet was placed, in a glass tube, in which it could be moved freely up or down, a graduated scale having been fixed to the tube to mark the exact distance between the contiguous poles of the two magnets; and when the poles were brought very near each other, mica, paper, card-board, &c., were placed between them, 2, 4, or 8 pieces being pasted together to obtain the duplicate ratios of the distances. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Excerpt from The London, Edinburgh and Dublin Philosophical Magazine and Journal of Science, Vol. 5: January June, 1853 It will be remarked that there are two ranges of temperatures in the engine I have described, viz. That of the pump, and that of the cylinder. Owing, however, to the exact proportion which subsists between the two, the same result is arrived at by the application Of Professor Thomson's formula to either of them. Taking, therefore, the range of the cylinder, and converting the temperatures Of the air entering and discharged from the cylinder into the absolute temperatures from the real zero by adding to them we obtain for the work evolved by the consumption of a grain of coal. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Excerpt from The London and Edinburgh Philosophical Magazine and Journal of Science, Vol. 14: New and United Series of the Philosophical Magazine, Annals of Philosophy, and Journal of Science; January-June, 1839 Dr. Henry's paper on this subject, from the Philosophical Trans actions, will be found in Phil. Mag. First Series, vol. Lxv. P. 269. - ed1t. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Excerpt from London and Edinburgh Philosophical Magazine and Journal of Science, 1849, Vol. 35 The inorganic constituents of vegetable and animal substances have received more attention during the last few fears than was formerly the case; and in consequence of Liebig's exertions especially, numerous investigations of the ashes of organic substances' have been made; but their principal object was only technical. It was soon perceived, that as plants derive the inorganic constituents, without which they cannot exist, from the soil, it was of the greatest importance to determine these constituents with accuracy, so as to be enabled to judge whether the soil was capable of yielding them; and if not so, to allow of their being added in the form of a suitable manure. Hitherto almost all these investigations have been directed to the determination of the relative proportions of the inorganic constituents of the ash. Occasionally, indeed, the presence of certain inorganic constituents, especially salts, has been detected by microscopic examinations; but scarcely any one has expressly taken up the question which is somewhat closely connected with this point, viz. in what manner are the inorganic substances combined with the organic? Whether they form with each other the same kinds of combinations as those which are artificially prepared in our laboratories, or whether peculiar compounds, existing only in living organic bodies, are formed by the mutual influence of the inorganic upon the organic matters, are questions which must be of great importance, especially in animal and vegetable physiology, and which have not hitherto been accurately investigated. In very few instances only have researches of this kind been attempted. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Excerpt from The London and Edinburgh Philosophical Magazine and Journal of Science, Vol. 7: New and United Series of the Philosophical Magazine, Annals of Philosophy, and Journal of Science Dalmahoy on the greater calorific Effect of the Sun' 8 di rect Rays in high than in low Latitudes. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Excerpt from The London and Edinburgh Philosophical Magazine and Journal of Science, Vol. 12: New and United Series of the Philosophical Magazine, Annals of Philosophy, and Journal of Science, January June, 1838 This work, says the author, will be divided into two parts. A The first memoir will contain a series of experiments on the determination of the temperature of the maximum density of pure water, and on the dilatation of that fluid from this maximum to its boiling point, and on the other hand to - 13° Cent. The second will consist of the results of the experiments on the maximum density of sea-water, and on the general course of the phenomenon in aqueous, saline, acid, alkaline, and alcoholic solutions of different degrees of concentration. Extract from the First Memoir. From 1832 and 1833, I have been occupied in the investigation of these subjects, and have laid some of the results before the Academy. Since that time I have repeated and modified the experiments, so that I believe I have now arrived at results more certain and general. I proved that all saline solutions have, like pure water, a maximum density. I at first only wished to know whether sea-water did or did not possess a maximum. It is known that Marcet of Geneva and Ermann of Berlin, the only two physicists who have of later date devoted themselves to experimental researches on this subject, did not find a maximum; we shall see the reason of this in the second memoir. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Excerpt from The London and Edinburgh Philosophical Magazine and Journal of Science, Vol. 1: New and United Series of the Philosophical Magazine and Journal of Science; July December, 1832 Mr. B. Bevan's Tabular Abstract of the Results of Captain Lloyd 3 Levelling from the Sea near Sheerness to the River Thames at London Bridge. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Excerpt from The London and Edinburgh Philosophical Magazine and Journal of Science, Vol. 3: New and United Series of the Philosophical Magazine and Journal of Science; July December, 1833 Mr. N. J. Winch's Contributions to the Geology of Northum berland and Durham (continued) Mr. B. Bevan's Table of the First, Second, and Third Powers of the Sines to Centesimal Parts of the Versed Sine. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.