The Preparation of Illustrations for Reports of the United States Geological Survey / With Brief Descriptions of Processes of Reproduction

by John L. Ridgway

FOR REPORTS OF THE

UNITED STATES GEOLOGICAL SURVEY

WITH BRIEF DESCRIPTIONS OF PROCESSES
OF REPRODUCTION

BY

JOHN L. RIDGWAY

WASHINGTON

GOVERNMENT PRINTING OFFICE
1920

THE PREPARATION OF ILLUSTRATIONS FOR REPORTS OF THE UNITED STATES GEOLOGICAL SURVEY BY JOHN L. RIDGWAY