BY
FREDERIC A. WOLL, Ph.D.,
Associate Professor, Department of Hygiene, College of the City of New York; Optometry Courses, Columbia University; Member of New York State Board of Examiners in Optometry; Honorary Member: American Optometric Association; State Societies—Alabama, California, Connecticut, Kentucky, Maine, Massachusetts, North Carolina, Rhode Island; Local Societies—Lehigh Valley Society of Optometrists, Mahoning Valley Optometrists’ Society, and Optometrists’ Club of Brooklyn.
SECOND EDITION
NEW YORK
FREDERIC A. WOLL
1924
Copyright, 1914, by
FREDERIC A. WOLL
Printed in the United States of America
First Edition, July, 1914
Second Edition, April, 1924
SCHLUETER PRINTING CO., NEW YORK
DEDICATION