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BEING A SIMPLE TEXTBOOK ON PERSONAL
HEALTH AND HOW TO KEEP IT
JOHN W. RITCHIE
PROFESSOR OF BIOLOGY, COLLEGE OF WILLIAM AND MARY, VIRGINIA
JOSEPH S. CALDWELL
PROFESSOR OF PLANT PHYSIOLOGY,
YONKERS-ON-HUDSON, NEW YORK
Edur T 399.17.730
CONSERVATION OF HEALTH
“ Our national health is physically our greatest asset.
PRIMER OF HYGIENE
By John W. Ritchie of the College of William and Mary in Virginia
PRIMER OF SANITATION
By John W. Ritchie. Illustrated. Cloth. List price 50 cents.
PRIMER OF PHYSIOLOGY
By John W. Ritchie. Illustrated. Cloth. List price 60 cents. Teaches health conservation through practical applications to daily life of modern hygiene based on physiological principles as required in sixth or seventh grades; the most advanced of the three primers.
By John W. Ritchie. Illustrated in black and in colors. Cloth.
WORLD BOOK COMPANY
YONKERS-ON-HUDSON, NEW YORK
RCP OF H : RE- 28
Copyright, 1910, 1915, by World Book Company. Entered at Stationers' Hall,
London. All rights reserved.
HARVARD COLLEGE LICRARY
DEC 5 1923
In comparatively recent years a new knowledge that is able to save man from a great part of the sickness that has heretofore afflicted him has come into the world. This knowledge reaches the people but slowly, however, and there are yet at all times in the United States three millions of people who are seriously ill, one half of them suffering from ailments that are easily preventable.
The writers of this text have felt that the greatest immediate service our schools can render is to teach the facts that will enable the people to shake off the great burden of preventable disease that they are now carrying. They believe that hygiene should be faithfully taught in every schoolroom in the land, and that the object of teaching it should be the prevention of sickness. He who would seek the motive of this small volume will therefore easily find it; for the single purpose of the authors has been to select the facts that have been shown by modern science to be vital in health conservation, and to present these facts in the simplest form possible.
It is believed that those familiar with our crowded school curricula will appreciate the slim compass into which the matter has been brought, and it is hoped that this little book may serve a useful purpose in the hands of those earnest teachers who are leading their pupils and their communities into the Era of Health that lies before us.
It is impossible to name all who have read the proofs of this book and assisted the authors by valuable suggestions and criticisms, but among those to whom grateful acknowledgment is made
are the following: Leonard P. Ayres, Dr. L. B. Bibb, Dr. H. M. Bracken, Dr. William H. Burnham, Dr. C. Ward Crampton, Dr. S. J. Crumbine, Dr. Martin H. Fischer, Dr. Christian A. Herter, Prof. C. W. Hetherington, Dr. Samuel A. Hopkins, Dr. J. N. Hurty, Dr. F. V. Jackson, Dr. James M. King, Dr. George D. Leslie, Dr. R. Tait McKenzie, Dr. H. W. Morgan, Dr. S. W. Newmayer, Dr. J. E. Raycroft, Dr. G. F. Rheinhardt, Dr. Stewart R. Roberts, Dr. William F. Snow, Dr. A. R. Ward, Dr. Herbert L. Wheeler, Dr. C. E. A. Winslow.
The Oral Hygiene Committee of the National Dental Association, through Dr. W. G. Ebersole, Dr. W. A. White, and Dr. Paul G. White, chairman of the textbook committee, has given help for which grateful acknowledgment is made; and for giving the book the invaluable test of actual use in the schoolroom the authors are indebted to Miss Florence Gray, Yonkers, New York; Miss Mary Pierce and Miss Frances Dunn, Farmville, Virginia; Miss Virginia Jones, Williamsburg, Virginia; and Miss Jessie B. Montgomery, Terre Haute, Indiana.
Other practical and experienced teachers who read the proof and gave helpful suggestions were Miss Josephine K. Bauer, Indianapolis, Indiana; Frank Evans, Spartanburg, South Carolina; Miss Minnie Fisher, Montgomery, Alabama; Miss Mary P. Jones, Nashville, Tennessee; Mrs. John L. Price, Florence, Alabama; and Miss Flora Wilber, Fort Wayne, Indiana.