| RefNo | HS/18/17 |
| Level | Item |
| Title | Letter, from James Thomas Walker to Sir John Herschel, dated at 1 Cromwell Road, South Kensington |
| Creator | James Thomas Walker |
| Recipient | John Frederick William Herschel |
| Date | 15 December 1864 |
| Description | Autograph letter signed by sender. Indian Triangulation chart showed progress to May 1862. Explains why arcs of meridians and parallels were chosen over diagonal braces. G. B. Airy's method of determining errors helped. Will take note and package from Maria [Herschel] to John Frederick William Herschel's son John. |
| Language | English |
| Extent | 5pp |
| Format | Manuscript |
| Place origin | 1 Cromwell Road, South Kensington |
| Digital images | View item on Science in the Making |
| AccessStatus | Open |
| URLDescription | Also available on Epsilon |
| URL | https://epsilon.ac.uk/view/herschel/letters/Herschel7809
|
Fellows associated with this archive
| Code | PersonName | Dates |
| NA6271 | Walker; James Thomas (1826 - 1896) | 1826 - 1896 |
| NA8238 | Herschel; Sir; John Frederick William (1792 - 1871); mathematician and astronomer | 1792 - 1871 |