| Reference number | HS/6/8 |
| Level | Item |
| Title | Letter, from John Henry Dallmeyer to Sir John Herschel, dated at 19 Bloomsbury St. |
| Creator | Dallmeyer; John David (1830-1883); Anglo-German optician |
| Date | 23 December 1870 |
| Description | Autograph letter signed by sender. Has made a trial of John Frederick William Herschel's lens but it was too large to be satisfactory. Regarding the 'graphoscope,' a new toy. Has been concerned with the manufacture of an improved form of opera glass. Present forms have many imperfections. Gives details of his own theories and sends one for John Frederick William Herschel's notice. |
| Language | English |
| Extent | 7pp |
| Format | Manuscript |
| Place origin | 19 Bloomsbury St., London |
| Origin coordinates | 51.51764, -0.12745 |
| Digital images | View item on Science in the Making |
| Access status | Open |
| URL description | Also available on Epsilon |
| URL | https://epsilon.ac.uk/view/herschel/letters/Herschel6690
|
Fellows associated with this archive
| Code | Name | Dates |
| NA8238 | Herschel; Sir; John Frederick William (1792 - 1871); astronomer | 1792 - 1871 |