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 131
r in the middle thanthey are towards the Ys. Long centers, German silver tangent and clampscrew, attached to the bar and revolving with same, are special features ofthese Y levels. REPAIRS OF INSTRUMENTS. We are prepared to repair surveying instruments of all kinds, and glialantee good work and… … 970 No. 970. Farmers or Drainage Level, with tripod, complete. Each.$25 00 The figure represents a level combining the extremes of simplicity and compactness withreal efficiency, and all at a very moderate cost. The telescope is about nine inches long and ismade especially for this instrument,…
Drawing instruments
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