The Philosophical Magazine, Vol. 24

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Excerpt from The Philosophical Magazine, Vol. 24: Comprehending the Various Branches of Science, the Liberal and Fine Arts, Agriculture, Manufactures and Commerce, For February, March, April and May, 1806 Does the chrome exist in the state of acid or in that of oxide in the mineral termed chromate of iron? M. Godon de saint-mesmin, in a memoir upon the combinations of chromic acid, read at the National Institute, has discussed this question, and is inclined to think that it is in the state of oxide. M. Vauquelin, in his report of this memoir, seems disposed to adopt the same opinion. I shall mere ly state, in support of this idea, an experiment which renders it probables If the green oxide of chrome be gently calcined with pure potash, it is almost immediately brought to the state of an acid: we are therefore not war ranted in asserting that chrome exists as an acid in the chromate of iron, while by the presence of potash this con version of the oxide is rendered likely. T is then, at least, highly probable that the mineral which till now has te ceived the name of chromate of iron, is, in fact, no other than a combination of the oxides of iron and chrome. 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.