| RefNo | HS/18/37 | 
| Level | Item | 
| Title | Letter, from Henry Warburton to Sir John Herschel, dated at 45 Cadogan Place | 
| Creator | Henry Warburton | 
| Recipient | John Frederick William Herschel | 
| Date | 3 June 1816 | 
| Description | Autograph letter signed by sender. Discussed John Frederick William Herschel's proposed felspar paper [see Henry Warburton's 1816-4-24] with W. H. Wollaston. Suggests using Wollaston's and [recently deceased Smithson] Tennant's unpublished method to test for alkalis and give Tennant credit for it. James Smithson first coined term 'silicate'. | 
| Language | English | 
| Extent | 3pp | 
| Format | Manuscript | 
| Place origin | 45 Cadogan Place, London | 
| Origin coordinates | 51.496667, -0.1575 | 
| Digital images | View item on Science in the Making | 
| AccessStatus | Open | 
| URLDescription | Also available on Epsilon | 
| URL | https://epsilon.ac.uk/view/herschel/letters/Herschel7833 | 
Fellows associated with this archive
| Code | PersonName | Dates | 
| NA3076 | Warburton; Henry (? 1784 - 1858); politician | ? 1784 - 1858 | 
| NA8238 | Herschel; Sir; John Frederick William (1792 - 1871); mathematician and astronomer | 1792 - 1871 |