| RefNo | HS/25/5/16 |
| Level | Item |
| Title | Copy letter, from Sir John Herschel to [William Whewell], dated at Slough |
| Creator | John Frederick William Herschel |
| Date | 28 August 1839 |
| Description | Contemporary copy in sender's hand, signed by sender. Wishes to have mentioned to the Physical Section of the B.A.A.S. that John Frederick William Herschel has discovered that the extreme red rays [infra-red?] of the sun do not darken photographic paper, but tend to whiten it. |
| Language | English |
| Extent | 4pp |
| Format | Manuscript |
| Place origin | Slough, Berkshire |
| Origin coordinates | 51.5082, -0.5954 |
| AccessStatus | Open |
| URLDescription | Also available on Epsilon |
| URL | https://epsilon.ac.uk/view/herschel/letters/Herschel1065
|
Fellows associated with this archive
| Code | PersonName | Dates |
| NA8238 | Herschel; Sir; John Frederick William (1792 - 1871); astronomer | 1792 - 1871 |
| NA6578 | Whewell; William (1794 - 1866); college head and writer on the history and philosophy of science | 1794 - 1866 |