Improved Patent Portable Theodolite
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LicenseImproved Patent Portable Theodolite
Science Museum Group
© The Board of Trustees of the Science Museum
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Improved Patent Portable Theodolite, consisting of prismatic compass, telescopic sight and level by C. A. Schmalcalder, 82 Strand, London, England, 1818-1826.
Charles Schmalcalder designed this theodolite to be lightweight and versatile, appropriate for rapid military or expeditionary surveys. It incorporates a prismatic compass, which Schmalcalder had patented in 1812. The instrument also features a telescopic sight and spirit bubble.
Details
- Category:
- Surveying
- Object Number:
- 1911-180
- Materials:
- brass (copper, zinc alloy), glass, steel (metal) and spirit
- Measurements:
-
overall: 165 mm x 160 mm x 92 mm, .85kg
- type:
- theodolite, prismatic compass and magnetic compass
- credit:
- Court, Thomas Henry
