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 121
902 903 900. Plumb Bob, brass, 6 ounce, steel point, screw cap §1 50 901. « 8 1 »;i 902. 12 2 00 903. « « 141/ u a u with long neck 2 -0 904. Adjustable Plumb Bob, brass, 10 ounces 2 50 This plumb bob lias a concealed reel, around which the string is wound. by turning the milled head on top- The…
Drawing instruments
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