PHYSIOLOGY AND HYGIENE COMPILED BY THE STATE TEXT-BOOK COMMITTEE AND APPROVED BY THE STATE BOARD OF EDUCATION SACRAMENTO FE. 18 1930 Sheldon Frend COPYRIGHT, 1906, BY THE PEOPLE OF THE STATE OF CALIFORNIA COPYRIGHT, 1902, BY BUEL P. COLTON In the compilation of this book certain matter from an Elementary PREFACE. IN preparing this work for younger students especial pains have been taken to make it clear and simple. Sentences, paragraphs, and chapters have been made short, and a concise summary follows each chapter. So far as possible technical terms have been avoided and English words preferred to Latin, for instance, post-caval vein instead of vena cava inferior, spinal bulb instead of medulla oblongata, etc. The Latin form of the plural puzzles the student who has not had Latin; hence the English form. of the plural is used, as pleuras, ganglions, ciliums, villuses, papillas, etc. The illustrations are made clear and distinct, and are labeled directly; that is, the detail labels are on, or very close to, the part labeled, so that time and effort are not needed to associate the thing and the name. A large number of the illustrations are original. A few simple experiments are given; for although much less can be done than with older students, yet considerable must be done if the subject is to be made clear. The subject of hygiene has received careful attention; for it must not be forgotten that the main object of this study is that each pupil may learn how to take better care of his own body. It has been the aim not to give mere arbitrary rules of health, to be blindly and implicitly followed, but to base all precepts of hygiene on the general principles of physiology, so that the pupil may understand the why and the how so far as possible. His obedience will be more ready and more complete when based on intelligence than when it is simply a submission to a peremptory command. In many cases, too, the general principle will serve as a guide where no rule has been laid down; no treatise can cover all possible contingencies. At the end of the book is a glossary in which all technical terms are pronounced and explained. |