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 134
LEVELS. ARCHITECTS LEVEL, WITH COMPASS. … No. Each. 977. Architects or Builders Y Level, telescope 11 incheslong, with dust shade and cross hairs, fine divided bubble,object glass with rack movement, eye piece adjustable,compass divided to degrees, fine needle, horizontal circle3 inch, divided to degrees, with vernier reading to 5minutes.…
Drawing instruments
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