| Reference number | MS/743/1/173 |
| Level | Item |
| Title | Copy letter from Thomas Colby to Robert Stevenson |
| Date | 1 November 1821 [1860?] |
| Description | On the composition of lighthouse glass, referencing Annales de Chimie. Comparing the light output of the Folkstone Hill Lighthouse with that of the Dungeness Lighthouse. With a covering note by David Brewster commencing "This letter I never saw till now...." |
| Extent | 4p |
| Format | Manuscript |
| Access status | Open |
Fellows associated with this archive
| Code | Name | Dates |
| NA3821 | Colby; Thomas Frederick (1784 - 1852) | 1784 - 1852 |
| NA7450 | Brewster; Sir; David (1781 - 1868); natural philosopher | 1781 - 1868 |