A Preliminary Report On A Part Of The Phosphates And Marls Of Georgia PDF Download

Excerpt from A Preliminary Report: On a Part of the Phosphates and Marls of Georgia Venezuela, Guiana and the coast of Africa, in the last decade, have furnished the European markets with considerable quantities of guano; but, as a result of the more humid condition of the atmosphere, under which it has been accumulated, it is usually inferior to the Peruvian deposits in ammonia, and, consequently, less valued as a fer tilizer. Previous to the introduction of guano into-europe, the chief com mercial fertilizers used, were animal charcoal and crushed bone, the only form of phosphates then known. On account of the insolubil ity of these manures, it was frequently necessary to use from one to two thousand pounds per acre, in order to obtain satisfactory results. During the year 1841, Dr. Liebig, the German chemist, discovered a process cf treating bones with sulphuric acid, which rendered the cal oium phosphate soluble. Bones, thus treated, were found, by experi ment, to have increased their fertilizing property more than fourfold. This important discovery was almost immediately followed by the erection of the first acid phosphate factory, in London, by J. B. 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.