![](https://coimages.sciencemuseumgroup.org.uk/28/981/large_thumbnail_1894_0106.jpg)
28 inch level, by Troughton and Simms, with case
- Made:
- 1801-1831
- maker:
- Troughton and Simms Limited
![28 inch level made by Troughton and Simms, early 19th century](https://coimages.sciencemuseumgroup.org.uk/432/422/medium_smg00173174.jpg)
28 inch level made by Troughton and Simms, early 19th century, used by J.A. Lloyd in 1831 to ascertain the fall of the Thames between London Bridge and Sheerness in box