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Excerpt from The Progressive Farmer: A Scientific Treatise on Agricultural Chemistry, the Geology of Agriculture; On Plant, Animals, Manure, and Soils, Applied to Practical Agriculture Also, calcium, an element, will combine with the ele ment, oxygen, precisely 20 lbs. Of the first to 8 lbs. Of the last, and form 28 lbs. Of quick-lime. Now, if we take these two compounds, water and quick-lime, 9 lbs. Of the former will combine with 28 lbs. Of the latter, and form 37 lbs. Of slacked lime. It is true, you might put more than 9 lbs. Of water to 28 lbs. Of lime, but the excess would soon evaporate, leaving precisely 9 lbs. Combined with the. Lime in the form of a dry, white powder, (water-slacked lime). If you were to put less than 9 lbs. Of water to 28 of lime, then only a part of the lime would be slacked; and in order to slack the whole, you would have to continue putting on water till you had reached the 91bs., when the whole would be reduced to a dry, white powder. It is so with all chemical combinations they are always in definite, fixed and unalterable proportions. In this respect they differ from mere mixtures, which may be in any proportions. 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.

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