Excerpt from Johnston's Elements of Agricultural Chemistry The great advance Agricultural Chemistry has made during the last few years has rendered an entirely new edition of this text-book necessary. The work has consequently been subjected to most careful revision. Large portions of the book have been entirely rewritten, and much new matter added. The only portion which has been practically left unaltered is the geological section. It is especially hoped that the Chapters on Milk and Dairy Products, in which a short summary of some of the more important results of recent investigations is given, may add to the value of the new edition. As the work does t claim to be a text-book of pure Chemistry, students unacquainted with that science are referred to any of the many excellent chemical text-books. 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 techlogy 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.