Description:
- Object ID: ALSA 2016.01.07
- Made by: Wild Heerbrugg, Switzerland
- Model: T3
- Serial Number: 91173
- Date Made: Date of production of this T3 is 1962.
- Approximate size: 44 cm (h) X 19.5 cm (w)
- Accessories: Metal instrument carrying (bomb) case with various lighting attachments, sun filter and prisms.
- Condition: Good
Commentary:
The T3 was produced between 1925 and 1988. It is similar to the T2 in operation, however with larger and more accurate circles. It was used for 1st and 2nd order triangulation. The circle reading accuracy is 0.2” or 0.5”. The T3 was adopted by Geodetic Survey of Canada in 1927 as the workhorse for triangulation work and by 1929, twelve instruments were in use.
The metal instrument carrying (bomb) case contains two lighting attachments, a screw on sun filter prism and one screw on vernier reading prism and a 24x and a 40x magnifying lens.
Source of Object: Donated by Natural Resources Canada.
Notes: The Society has a second T3, ALSA 2015.02.01, also donated by Natural Resources Canada..
References: Visit article Wild – The Leader in Optical Theodolites for additional information.
Description by: Entered by Ed Titanich on December 1, 2024.