The Philosophical Magazine, 1800, Vol. 7

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Excerpt from The Philosophical Magazine, 1800, Vol. 7: Comprehending the Various Branches of Science, the Liberal and Fine Arts, Agriculture, Manufactures, and CommerceA h indred parts ofthe calx above mentioned, which in the French potteries is called calcine, is generally taken with 100 parts of land. From 25 to 30 pounds of fea falt, or moriat of foda, are added the whole IS well mixed together, and it is fufed in the bottom of a furnace in which potter's ware is baked. This matter is generally placed on tand, on lime quenched in the open air, or on athes. The bottom of the wafs is in general badly fufed. This, however, does not prevent the matter, after it has been pounded, and applied on the articles, from becoming exceedingly white and hard in the furnace. When taken from the furnace it is not white, it is even often very black: in general it is marbled with black, gray, and white.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.