Catalogue. A.H. Abbott & co., manufacturers and importers of mathematical and surveying instruments and drawing materials of every description .. (1896)
Abbott, A. H., & co., Chicago. [from old catalog] · [Chicago] · leaf 93
actor, 4 inch, German silver, beveled on inner edge, divided to 1 degree $2 35 Protractor, 5 inch, German silver, beveled on inner edge, divided to 3^ degree 3 00 Protractor, 6 inch, German silver, beveled on inner edge, divided to % degree 3 50 Protractor, 6 inch, German silver, beveled on inner… … 551. 551.552. Semi=circular Protractor, German silver, 6 inch, withhorn center and movable arm, divided to % degree 7 50 Semicircular Protractor, German silver, 7 inch, with horn center and movable arm, divided to % degree 9 00 87
Drawing instruments
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