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 169
HARD RUBBER RAILROAD CURVES. … No. 1620.1621. 1622. 1623. 1624. 1620 Each. Hard Rubber Railroad Curves, 10 in a set, viz.: 12,24,36, 48, 60, 72, 84, 96, 108,120 inch radius, in wooden box $6 50 Hard Rubber Railroad Curves, 17 in a set, viz.: 12,15,18,21, 24, 27,30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60 inch radius,in wooden box…
Drawing instruments
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