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 98
i, inch to the foot, & inch, full size 2 00 1 50 1 50 2 00 2 00 … 602. Flat Boxwood Scale, 12 inch, beveled and divided on both sides, div. %, %, %, lx%, %, 1%, 3 inch to the foot 603. Flat Boxwood Scale, 18 inch, beveled and divided on both sides, div. %, %> %, lx%, %, 1%, 3 inch to the foot 604. Flat Boxwood Scale, 24 inch, beveled and divided on both sides,…
Drawing instruments
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