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 108
Each. Positive Section Liner, with weights, so as to lie firm on drawing board, in case $6 50 … 776. Standard Section Liner, in case 2 00 Strong, simple and durable. Great range of work, allowing space fromtoW t0 % inch, at any angle, without changing position. Retains its place on the board by means of pins in the bottom of base andwithout the aid of T-square, straight edge, hands or…
Drawing instruments
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