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 94
SWISS PROTRACTORS, Of German Silver. … 553No. Each. 553. Semi=circular Protractor, German silver, h% inch, with horn center and movable arm, divided to % degree,vernier reading to 3 minutes $11 00 554. Semi=circular Protractor, German silver, 8 inch, with horn center and movable arm, divided to % degree, ver-nier reading to 1 minute 14…
Drawing instruments
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