Clays of Economic Importance in the Federated Malay States (Classic Reprint)

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Excerpt from Clays of Economic Importance in the Federated Malay States Hutchings, in his researches on the 'probable origin Of some slates, ' 1 has shown that in some cases what has been vaguely described as clay substance' is in reality a mixture Of quartz, felspar, and sericite (a secondary mica), and that the presence Of kaolinite is incapable Of proof. The mica, quartz and felspar particles (quite apart from the coarse grains) much exceed in quantity the so-called kaolin. Indeed the mineral kaolinite, although formerly supposed to be present in quantity in clays, is comparatively rare and careful microscopic examination Of specimens Of the kaolins Of Malaya has Shown that the hexagonal scales, usually seen in kaolinite, are very seldom, if ever, present. It will be shown later that there is strong evidence in favour Of supposing in addition to kaolinite the presence in the kaolin of Malaya, Of a mineral or minerals containing a higher percentage Of alumina than does kaolinite. 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.