Brinton, Willard Cope, 1880- · New York, The Engineering magazine company · leaf 264
247 MAPS AND PINS … Fig. 199. A Full-size Illustration Showing Some of the Different Arrangements of Map Pins and of Beads Which Can be Used for Map Work The size of the various beads and pins can be determined by measuring on the above picture with an ordi- nary ruler, as the articles are shown in their exact size 4.…
Graphic methods · Statistics
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