| RefNo | HS/10/446 |
| Level | Item |
| Title | Letter, from Christopher Johnson to Sir John Herschel, dated at Lancaster |
| Creator | Johnson; Christopher (1782-1866); surgeon; mayor of Lancaster? |
| Recipient | John Frederick William Herschel |
| Date | 5 March 1840 |
| Description | Autograph letter signed by sender. Has just seen John Frederick William Herschel's communication in the P.M. regarding an improvement to a lamp. Points out that the late Charles Seward obtained a patent for this improvement some thirty years ago. |
| Language | English |
| Extent | 4pp |
| Format | Manuscript |
| Place origin | Lancaster |
| Digital images | View item on Science in the Making |
| AccessStatus | Open |
| URLDescription | Also available on Epsilon |
| URL | https://epsilon.ac.uk/view/herschel/letters/Herschel11109
|
Fellows associated with this archive
| Code | PersonName | Dates |
| NA8238 | Herschel; Sir; John Frederick William (1792 - 1871); mathematician and astronomer | 1792 - 1871 |