Excerpt from On Agricultural Chemistry, and the Nature and Properties of Peruvian Guano The mode of calculating the value of manures is one Which I have for many years adopted, and I trust the ease, accuracy, and simplicity of the plan, will make it of considerable utility to the. 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.