| Reference number | HS/17/284 |
| Level | Item |
| Title | Letter, from William Henry Fox Talbot to Sir John Herschel, dated at 44 Queen Anne St. |
| Creator | William Henry Fox Talbot |
| Date | 19 February 1839 |
| Description | Autograph letter signed by sender. Describes mediocre results obtained using ferrocyanate of potash for fixing image. Mentions some other methods, including his favorite, common salt. Asks John Frederick William Herschel to keep these secret. |
| Language | English |
| Extent | 2pp |
| Format | Manuscript |
| Place origin | 44 Queen Anne St., London |
| Origin coordinates | 51.518611, -0.145 |
| Digital images | View item on Science in the Making |
| Access status | Open |
| URL description | Also available on Epsilon |
| URL | https://epsilon.ac.uk/view/herschel/letters/Herschel1333
|
Fellows associated with this archive
| Code | Name | Dates |
| NA5837 | Talbot; William Henry Fox (1800 - 1877) | 1800 - 1877 |
| NA8238 | Herschel; Sir; John Frederick William (1792 - 1871); astronomer | 1792 - 1871 |