Brinton, Willard Cope, 1880- · New York, The Engineering magazine company · leaf 248
231 MAPS AND PINS map. A layer of the cheapest kind of mushn placed over the face of the straw-board will prevent the pins from tearing the surface of the map if they happen not to be pushed in exactly straight. The use of cloth over the straw-board also permits of changing the pins many more times… … Reoiew 0/ Reiyttws Fig. i88. Every Pin Dot on this Map Marks the Home of a Student of the University of Cincinnati By using a map printed in colors which do not photograph as black, the pins show up distinctly on the map as a background Before mounting a map the colors should be tested to make sure…
Graphic methods · Statistics
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