Feeds and Feeding, first published in March, 1898, was received with immediate and widespread favor by practical stockmen, as well as by the professors and students of animal husbandry in our agricultural colleges and secondary schools. The plan of the book had been laid along original lines, and neither time, labor, nor expense was spared in its preparation. In 1910, after nine editions had come from the press, the book was entirely rewritten and improved in many ways. During the lapse of time since that date, the accumulation of new and important matter, both scientific and practical, has made another revision desirable. Accordingly, more than two years ago, the preparation of this, the second revision, was be gun, Professor F. B. Morrison, who had so ably assisted with every page of the first revision, becoming joint author herein with the original author. With a corps of trained assistants he has devoted much time during the past two years to the preparation of this second revision. Previous to and during its writing he has visited numerous stock farms and ranches as well as the agricultural colleges and experiment stations of many states, so that now the combined observations and studies of the joint authors, along the lines of both theoretical and practical animal husbandry, cover quite intimately every state of the Union, as well as parts of Canada and the Old World.