| RefNo | HS/18/246 | 
| Level | Item | 
| Title | Letter, from Alexander Wight, Jr. to Sir John Herschel, dated at 6 Clarenden Terrace, Notting Hill | 
| Creator | Wight; Alexander Jr. (fl.1856-?) | 
| Recipient | John Frederick William Herschel | 
| Date | 3 April 1856 | 
| Description | Autograph letter signed by sender, with annotation by Sir John Herschel. Sends small lens. Its components neither parallel nor concentric; contains water. Suggests new polishing method. Estimates 4-foot lens would cost £7-£8. [John Frederick William Herschel Note: Tested and returned lens. Noted advantages and deficiencies and suggests improvements. Listed others who built similar lenses.] | 
| Language | English | 
| Extent | 3pp,  1p | 
| Format | Manuscript | 
| Place origin | 6 Clarenden Terrace, Notting Hill | 
| Digital images | View item on Science in the Making | 
| AccessStatus | Open | 
| URLDescription | Also available on Epsilon | 
| URL | https://epsilon.ac.uk/view/herschel/letters/Herschel7979 | 
Fellows associated with this archive
| Code | PersonName | Dates | 
| NA8238 | Herschel; Sir; John Frederick William (1792 - 1871); mathematician and astronomer | 1792 - 1871 |