| Method | Steel engraving |
| Artist | G. Gabrielli |
| Published | Eton: Williams & Son , 1875. |
| Dimensions | Image 128 x 102 mm, Plate 242 x 167 mm, Sheet |
| Notes |
A bust length portrait of Sir John Herschel in an oval. Sir John Frederick William Herschel, 1st Baronet KH FRS (7 March 1792 – 11 May 1871) scientist, chemist, and astronomer, he was the son of William Hershcel. In addition to his work as an astronomer, he also made contributions to photography. An accomplished chemist, Herschel discovered the action of hyposulfite of soda on otherwise insoluble silver salts in 1819, which led to the use of "hypo" as a fixing agent in photography. In 1839, independently of William Henry Fox Talbot, Herschel also invented a photographic process using sensitized paper. It was Herschel who coined the use of the terms photography, positive, and negative to refer to photographic images. Condition: Some foxing in the margins, not affecting the image. |
| Framing | unmounted |
| Price | £90.00 |
| Stock ID | 40332 |