Books with author Robert Hoare

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Excerpt from A Compendium of the Course of Chemical Instruction in the Medical Department of the University of Pennsylvania, Vol. 1 of 2: Comprising the Chemistry of Heat and Light, and That Inorganic Substances, Usually Called Inorganic ChemistryIn all cases of liquefaction or fusion which have been examined, analogous results have been Observed; whence it is generally believed that whenever a solid is converted into a. Liquid, its particles unite with a portion Of the material cause Of heat, which becomes latent, as in the case Of ice in melting. The evidence is equally strong in favour Of the inference that in passing from the liquid to the aeriform state, ponderable matter combines with, and renders latent even a larger quantity Of heat in proportion to its weight, than in cases Of liquefaction.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.

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Robert Hoge has done pretty much every kind of writing there is. He has worked as a journalist, a speechwriter, a science writer, and a political advisor. He's also written numerous short stories, articles, and interviews that have been published in Australia and overseas. When he's not writing, Robert enjoys photography and talking with people about looking different and being disabled. He lives in Brisbane, Australia and is married and has two amazing daughters. Visit him at RobertHoge.com and follow him @RobertHoge.

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1840 Excerpt: ...the protosulphide in assuming a black colour, which, however, may be changed to red by sublimation. 1681. The bisulphide (artificial cinnabar) is procured in the large way, by fusing one part of sulphur, stirring in gradually six or seven of mercury, and subjecting the resulting black mass to the process of sublimation in close vessels. 1682. Kirchoff procured cinnabar by a long continued trituration of mercury and sulphur with a solution of caustic potash, aided by a gentle heat., 1683. Bisulphide of mercury is attacked neither by sulphuric, nitric nor chlorohydric acid, nor by caustic alkaline solutions; but when subjected to chlorine, either in aqueous solution as in aqua regia, or in the gaseous form, it is converted into bichloride of mercury, and bichloride of sulphur. 1684. Berzelius alleges that this bisulphide performs the part of a base in combining with the aeriform sulphacids. It also forms compounds with the bichloride, bibromide, biiodide, and bifluoride of mercury. 1685. Equal parts by weight of mercury and sulphur, triturated together, form a black mass, called, from its colpur, Ethiops mineral, which is now considered as a mixture of bisulphide of mercury and sulphur. Guibourt, who has been mentioned as questioning the existence of more than one oxide of mercury, has alleged his disbelief in the existence of more than one mercurial sulphide; the black sulphide being, in his opinion, a mixture of the red with the metal. Seftstrom controverts this allegation, and Thenard, citing his opinions and that of Guibourt, inclines in favour of those of Seftstrom. Thenard alleges that at least the protosulphide exists as a base, in combination with sulphides, acting of course as sulphacids agreeably to my definition. (631.) Of the Phogphurets of Mercur...