Preparation of illustrations for reports of

The Preparation of Illustrations for Reports of the United States Geological Survey With Brief Descriptions of Processes of Reproduction This edition features  ? illustrations  ? a linked Table of Contents, Footnotes, and Index   CONTENTS (abridged list) Part I. Preparation by Authors.      Introduction      Purpose and value of illustrations      Selection and approval of illustrations Submittal of illustrations      Kinds of illustrations      Sizes of illustrations      Subdivisions of plates and figures      Preparation of copy by authors      Character of original material Preliminary preparation of maps      ... Part II. Preparation by Draftsmen.      General directions      Instruments      Classification of material      Preparation of maps      Projection      Details of base maps      ... Part III. Processes of Reproducing Illustrations.      Methods employed Photoengraving      General features      Zinc etching      Copper etching in relief      Half-tone engraving      Three-color half-tone process      Wax engraving (the cerotype process) Wood engraving      Photogelatin processes Lithography      Original process      Photolithography      Offset printing      Chromolithography      Engraving on stone and on copper            Appendix. Length of degrees of latitude and longitude      Metric system and equivalents      Geologic eras, periods, systems, epochs, and series      Chemical elements and symbols Greek alphabet      Roman numerals      Mathematical signs      Names of rocks