COPYRIGHT, 1922

BY

THE HENRY-MORRISON COMPANY

First edition published 1898; second edition 1900; third edition
1901; fourth edition 1902; fifth edition 1903; sixth edition 1904;
seventh edition 1906; eighth edition 1907; ninth edition 1908.
Tenth edition, rewritten and reset, published 1910; eleventh
edition 1911; twelfth edition 1912; thirteenth edition 1913; four-
teenth edition 1915. Fifteenth edition, rewritten and reset, pub-
lished 1915; sixteenth edition 1916; seventeenth_edition, August,
1918; reprinted December, 1918, February, 1919, June, 1919, Octo-
ber, 1919, January, 1920, August, 1920, September, 1921, Decem-
ber, 1921. Eighteenth edition, rewritten and reset, published
September, 1922.

Translated into Portuguese by F. M. Draenert, Sao Paulo,
Brazil, 1907.

Translated into Russian under direction of Paul Dubrovsky,
editor of "Agriculture and Forestry," and published by the Depart-
ment of Agriculture, for the use of agricultural schools and other
institutions of the Department, Petrograd, 1912.

PREFACE

SF95 H5 1922

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 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. Again in 1915 the book was completely rewritten and enlarged to include the recent information, both scientific and practical. To this revision Professor Morrison, who had assisted thruout the first revision and who now became joint author, devoted much time, with a corps of trained assistants, during a period of over two years. The favor with which this second revision was received exhausted two large editions in less than two years and nine printings of the last edition have been required in rapid succession.

During the past few years exceedingly important discoveries have been made concerning the science and practice of live stock feeding. Furthermore, economic conditions have radically changed. Therefore, Professor Morrison has again entirely rewritten the book to include the latest information and to adapt it to the changed economic conditions since the World War. Just as in the previous revision, the results of many important investigations, completed so recently as not yet to be in print, have been furnished by scientists thruout the country, in order that the findings might be presented in this revision.

It is the aim to give in Feeds and Feeding an unbiased and condensed presentation of the most important findings of the investigators of both the Old and New Worlds in the science of animal nutrition, together with the most important results of the vast number of feeding trials. which have been conducted at the experiment stations in the United States and other countries, the whole being rowded out by the practical experiences of many of the leading stockmen of America. The authors have not relied merely on a thoro study of the published information on nutrition and stock feeding, but have gained personal contact with conditions in various districts by extensive travel.

Part I presents briefly the fundamental principles of animal nutrition, including the most recent discoveries of the scientists. The bearing of these principles upon the practical feeding of live stock is given especial emphasis. Particular attention is given to the newer discoveries in nutrition, including the functions and importance of vitamines and mineral matter, as well as the differences in the quality of food proteins from various sources.

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