6 nice plates of survey instruments on heavy page stock from this 19th century survey report:

  1. Models of Tower and Tripod Signals
  2. Reconnaissance Telescope and Heliotrope
  3. Twelve Inch Direction Theodolite
  4. Twelve Inch Theodolite Arranged for Night Work, including lams, striding level and vertical circle
  5. Eight Inch Repeating Theodolite with Vertical Circle and Short Telescope, arranged for measuring zenith distances
  6. Eight Inch Repeating Theodolite with Large Telescope, as used in measuring horizontal angles

Title: The Final Results of the Triangulation of the New York State Survey, Together with a Description of the Methods Employed
Author: Commissioners of the State Survey
Publisher: Weed, Parsons and Company, Printers
Albany, 1887

Triangulation Survey Instruments
As always, the images here on OldBookArt are free to download and use in any way you please.

To purchase much higher resolution, full scale versions of these (as well as the uncropped full scale scans of the entire pages) at Alamy Click HERE. The full scale of the orignal cropped scans is 8800 pixels in height versus the 2000 px you see here.
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