Microptic transit theodolite No 1, 1954.

 
Microptic transit theodolite No 1, 1954.
4 0 c m
 
29cm
actual image size: 21cm x 32cm

Description

This instrument, devised in 1954 and made by Hilger and Watts, is extremely compact in comparison with earlier designs and, at 9 pounds in weight, considerably lighter. The telescope is sufficiently short to allow it to swivel completely over from back to front, allowing a very quick method of correcting for irregularities in the circles and supports.

Image Details

Image Ref.
 
10282390

© Science Museum / Science & Society Picture Library

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