Telescopic prismatic compass, 1813-1840.
Image number: 10282308
This telescopic prismatic compass was made by Charles Schmalcalder. Magnetic compasses are portable and easy to use for rapid survey where high accuracy is not required. Charles Schmalcalder took out a patent for a prismatic compass design in 1813. This example includes a telescope and spirit bubble.
- Image number:
- 10282308
- Credit:
- Science Museum/Science & Society Picture Library
- Date taken:
- 20 October 2003 12:27
- Image rights:
- Science Museum
