| RefNo | HS/10/438 | 
| Level | Item | 
| Title | Letter, from H. C. Jennings to Sir John Herschel, dated at Calais | 
| Creator | Jennings; H. C. (fl.1845) | 
| Recipient | John Frederick William Herschel | 
| Date | 28 June 1845 | 
| Description | Autograph letter signed by sender. Has found a method of making a gum equal to gum arabic. Would like the support of the Royal Society and John Frederick William Herschel to enable him to take out a patent. | 
| Language | English | 
| Extent | 3pp | 
| Format | Manuscript | 
| Place origin | Calais | 
| Digital images | View item on Science in the Making | 
| AccessStatus | Open | 
| URLDescription | Also available on Epsilon | 
| URL | https://epsilon.ac.uk/view/herschel/letters/Herschel11101 | 
Fellows associated with this archive
| Code | PersonName | Dates | 
| NA8238 | Herschel; Sir; John Frederick William (1792 - 1871); mathematician and astronomer | 1792 - 1871 |