Produced by Suzanne Lybarger, Janet Blenkinship, Brian Janes and the Online Distributed Proofreading Team at https://www.pgdp.net [Illustration: PLATE I THE CIRCULATION] FIRST BOOK IN PHYSIOLOGY AND HYGIENE BY J.H. KELLOGG, M.D. MEMBER OF THE AMERICAN MEDICAL ASSOCIATION, THE AMERICAN PUBLIC HEALTH ASSOCIATION, SOCIETE D'HYGIENE OF FRANCE, BRITISH AND AMERICAN ASSOCIATIONS FOR THE ADVANCEMENT OF SCIENCE, MICHIGAN STATE BOARD OF HEALTH, ETC. _ILLUSTRATED_ NEW AND REVISED EDITION NEW YORK CINCINNATI CHICAGO AMERICAN BOOK COMPANY Copyright, 1887, by HARPER & BROTHERS. Copyright, 1888, by HARPER & BROTHERS _All rights reserved._ W.P. 7 TO THE TEACHER. This book is intended for children. The special objects which the author has aimed to accomplish in the preparation of the work have been: 1. To present as fully as possible and proper in a work of this character a statement of the laws of healthful living, giving such special prominence to the subject of stimulants and narcotics as its recognized importance and the recent laws relating to the study of this branch of hygiene demand. 2. To present in a simple manner such anatomical and physiological facts as shall give the child a good fundamental knowledge of the structure and functions of the human body. 3. To present each topic in such clear and simple language as to enable the pupil to comprehend the subject-matter with little aid from the teacher; and to observe in the manner of presentation the principle that the things to be studied should be placed before the mind of the child before they are named. A natural and logical order has been observed in the sequence of topics. Technical terms have been used very sparingly, and only in their natural order, and are then fully explained and their pronunciation indicated, so that it is not thought necessary to append a glossary. 4. To present the subjects of Physiology and Hygiene in the light of the most recent authentic researches in these branches of science, and to avoid the numerous errors which have for many years been current in the school literature of these subjects. There is no subject in the presentation of which object-teaching may be employed with greater facility and profit than in teaching Physiology, and none which may be more advantageously impressed upon the student's mind by means of simple experimentation than the subject of Hygiene. Every teacher who uses this book is urgently requested to supplement each lesson by the use of object-teaching or experiments. A great number of simple experiments illustrative of both Physiology and Hygiene may be readily arranged. Many little experiments are suggested in the text, which should invariably be made before the class, each member of which should also be encouraged to repeat them at home. It is also most desirable that the teacher should have the aid of suitable charts and models.