| RefNo | HS/18/145 | 
| Level | Item | 
| Title | Letter, from Charles Wheatstone to Sir John Herschel, dated at 20 Conduit St, London | 
| Creator | Charles Wheatstone | 
| Recipient | John Frederick William Herschel | 
| Date | 23 August 1833 | 
| Description | Autograph letter signed by sender. Accepts John Frederick William Herschel's invitation to demonstrate [on 28 Aug.] Charles Wheatstone's portable optical and acoustical experiments and the 'whirling machine.' Asks John Frederick William Herschel to supply 'an electrical machine and a good sized jar.' Encloses copy of Charles Wheatstone's paper on Jew's harp. Will bring another paper and new 'Symphonion' for Mary Herschel. | 
| Language | English | 
| Extent | 1p | 
| Format | Manuscript | 
| Place origin | 20 Conduit St., London | 
| Origin coordinates | 51.5121, -0.1423 | 
| Digital images | View item on Science in the Making | 
| AccessStatus | Open | 
| URLDescription | Also available on Epsilon | 
| URL | https://epsilon.ac.uk/view/herschel/letters/Herschel7944 | 
Fellows associated with this archive
| Code | PersonName | Dates | 
| NA7559 | Wheatstone; Sir; Charles (1802 - 1875); physicist | 1802 - 1875 | 
| NA8238 | Herschel; Sir; John Frederick William (1792 - 1871); mathematician and astronomer | 1792 - 1871 |