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Illustrated catalogue of Wadsworth, Howland & Co. : importers and dealers in artists' supplies and architects' and engineers' stationery. (1885)
Wadsworth, Howland & Co. (Boston, Mass.) · Wadsworth, Howland & Co., Boston · leaf 139
No, 206. 136 Wadsworth, Howland & Coo No. 206. Protractor, ^j4 inches diameter, half circle, half degrees, with Vernier reading to three minutes, $11.00 207. Protractor, 8 inches diameter, half circle, quarter degrees, with \eriiier reading to one minute, • M-S^ 208. Protractor, 10 inches… … No. 209. 209. Protractor, 5^^^ inches diameter, whole circle, half degrees, with Vernier reading to three minutes, . .... 210. Protractor, 8 inches diameter, whole circle, cjuarter degrees, with Vernier reading to one minute, . , . . . . 211. Protractor, 10 inches diameter, whole circle, quarter…Artists' materials · Mathematical instruments
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