Front matter
Frank Roy Fraprie translation
AUTHORIZED TRANSLATION FROM THE SEVENTH GERMAN EDITION
BY FRANK ROY FRAPRIE, S.M., F.R.P.S. EDITOR OF AMERICAN PHOTOGRAPHY
AMERICAN PHOTOGRAPHIC PUBLISHING CO., BOSTON 17, MASSACHUSETTS 1923
Copyright, 1923 BY AMERICAN PHOTOGRAPHIC PUBLISHING CO.
Manufactured in the United States of America Electrotyped and printed, March, 1923
THE PLIMPTON PRESS NORWOOD·MASS·U·S·A