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
ircular Protractor, 7 edge, center on outer edge,Semi-circular Protractor, 8 edge, center on outer edge, inch, German silver, beveled divided to 1 degree 1 60 inch, German silver, beveled divided to J.< degree 2 25 inch, German silver, beveleddivided to % degree inch, German silver,… … Semi=circular edge, centerSemi=circular edge, centerSemi-circular edge, centerSemi-circular edge, centerSemi=circular edge, centerSemi-circular edge, center 545 A Each. Protractor, 4 inch, German silver, beveled on inner edge, divided to 1 degree $2 35 Protractor, 5 inch, German silver, beveled on…
Drawing instruments
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