id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
43232	Ridgway, John L.	The Preparation of Illustrations for Reports of the United States Geological Survey With Brief Descriptions of Processes of Reproduction			.txt	text/plain	40730	3109	71	drawing each feature in a separate color on one sheet unless the work In preparing an original geologic map a letter symbol, such as has SYMBOLS FOR USE ON MAPS SHOWING FEATURES OF GROUND WATER. SYMBOLS FOR USE ON MAPS SHOWING FEATURES OF GROUND WATER. drawings to be reproduced in colors in order to strengthen the lines map should preferably be photographed in order to obtain prints on made by an author with pencil on blue-lined section paper may be inked maps are shown in Plate IV, but the size and weight of each line or In the final preparation of a base map to be engraved and printed in shading is to be printed in a separate color the base map should be [Illustration: Figure 9.--Map bearing six areal line patterns.] and white line drawing, photograph, or like original is reproduced in Wax-engraved plates may be used for printing colored maps or diagrams,	./cache/43232.txt	./txt/43232.txt