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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. 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.
Excerpt from The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, Vol. 35: January-June, 1893 If hard glass be employed instead of porcelain, then there is insecurity in the joints between it and the glass used for the remainder of the apparatus. Metal tubes present similar difficulties with regard to the junctions, and are besides more or less porous at high temperatures. Another grave dis advantage is that, whether porcelain or glass tubes be used, there is always a chance of a crack occurring, and perhaps escaping notice. The reduction of the copper also presents great difficulty it is more difficult to get a strong stream of really pure hydrogen or carbon monoxide than to get the nitrogen; and any sulphur absorbed by the copper is a permanent disadvantage; for, as metallurgists know, copper contain ing sulphur may be oxidized and reduced many times and yet at each oxidation some sulphur will burn out. The reason is, of course, that sulphide of copper heated in air forms some sulphate of copper as well as sulphur dioxide. On the next reduction sulphide of copper is re-formed, and then, on passing air over the mixture, the process of incom plete oxidation is repeated. Judging by a discussion which took place in Section A of the British Association not long ago, these simple facts are not as widely known as might have been expected. I know of no reagent which will absorb sulphur dioxide so as to form an absolutely stable compound, and which is itself easy to prepare in a state of sufficient purity to be above suspicion of giving off foreign matters to the nitrogen. Of course it may he argued that a large number of vessels containing, say, a solution of caustic potash might be used, the second retaining the sulphur dioxide given off from the first, and so 011; but this device is obviously unsuited for a continuous process, where the reagents must be untouched for weeks or months. 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. 8: New and United Series of the Philosophical Magazine, Annals of Philosophy, and Journal of Science; January-June, 1836 Dr. R. Kane's Experiments on the Action of Ammonia on the Chlorides and Oxides of Mercury, and on the Composition of White Precipitate. Mr. Tovey's Researches in the Undulatory Theory of Light in continuation Of former Papers. 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 The London and Edinburgh Philosophical Magazine and Journal of Science, Vol. 16: New and United Series of the Philosophical Magazine, Annals of Philosophy, and Journal of Science; January-June, 1840 Sold BY longman, orme, brown, green, and' longmans; cadell simpkin and marshall; s. Highley; whittaker and co.; and sherwood, gilbert, and piper, london BY adam and charles black, and thomas clark, edinburgh; smith and son, glasgow; hodges and smith, dublin and G. W. M. Reynolds, paris. 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. 4: New and United Series of the Philosophical Magazine and Journal of Science; January-June, 1834 P. 397 It should have been stated that the notice on the Desiccation of Silver, from the Phil. Trans was extracted from a paper by Dr. 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 Since my return to Europe, after an absence of nearly three years, among the scientific publications that have attracted my attention, the Journal of the Geological Society of Dublin claimed particular notice. I rejoiced to perceive a growing spirit of geological inquiry in Ireland, and more especially as that spirit is understood to have been mainly excited and promoted by the Trigonometrical Survey of the island now in progress under the able conduct of Colonel Colby, R. E. It was, however, with surprise and regret that I read the following passage in the Address delivered at the First Annual Meeting of that Society by their President. Sneaking of the natural resources of Ireland, the learned author says: "Even native gold was found not many years ago in a neighbouring county in large wedges. 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. 9: New and United Series of the Philosophical Magazine, Annals of Philosophy, and Journal of Science; July-December, 1836 Mr. J. G.children's Notice respecting Dr. Ehrenberg's Collee tions ofdried Iļ¬‚usoria, and other microscopic Objects. 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, 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.