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 162
1445 1445. Hard Rubber Triangles, for roof pitches, 6 in set Set.$2 50 … 1450 No. 1450. Hard Rubber Triangles, for embankments, 8 in set Set.3 75 STEEL TRIANGLES. No. 1460. Steel Triangles, nickel plated, open center, 30x60°. 6 7 9 10 14 inch. $3 20 3 50 3 85 4 25 6 50 each. 1470. Steel Triangles, nickel plated, open center, 4r. . 5 7 8 10 12 inch. $3 20 3 50 4 25 5 50…
Drawing instruments
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