Inside Out Library · ExploreCatalogue. 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 158PATENT ADJUSTABLE T SQUARES. … 1251 No. 1251. Maple blade with curved walnut head, shellac finish, movable headand micrometer adjustment. 24 30 36 42 48 54 60 inch. $2 00 2 10 2 20 2 30 2 50 2 75 3 00 each.Drawing instrumentsInternet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.More pictures from Catalogue. A.H. Abbott & co., manufacturers and importers of mathematical and surveying instruments and drawing materials of every description ..More like this