Simple theodolite, with box, trade card and brass parts, by James Search of London, 1771-1781
Simple theodolites such as the circumferentor (with a full circle scale) and graphometer (with a half-circle scale) were widely used throughout the 17th and 18th centuries for angle measurement. A joint on the support allowed for both vertical and horizontal use. The tradecard on the box lid indicates that this circumferentor was made by James Search (active 1771-1781), a Mathematical, Philosophical and Optical Instrument maker who made and repaired instruments 'At the Globe in Crown Court, St Ann's Soho, London'.
Details
- Category:
- Surveying
- Object Number:
- 1944-11
- Materials:
- box, oak, circumferentor, brass, circumferentor, glass, circumferentor, iron, needle, glass
- type:
- simple theodolite
- taxonomy:
-
- furnishing and equipment
- measuring device - instrument
- magnetic compass
- furnishing and equipment
- measuring device - instrument
- credit:
- Winn, G.W.
Cite this page
Rights
We encourage the use and reuse of our collection data.
Data in the title, made, maker and details fields are released under Creative Commons Zero
Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence
Download
Download catalogue entry as json
Download 
manifest IIIF
Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.
