| RefNo | MS/257/4/483 | 
| AltRefNo | Sa.1622 | 
| Previous numbers | ES4/24/1622 | 
| Level | Item | 
| Title | Letter from Balfour Stewart, Kew Observatory to Edward Sabine | 
| Date | 20 February 1868 | 
| Description | Refers to Sabine’s aim to ‘have an actinometer as simple as possible’. | 
| Extent | 3p | 
| Format | Manuscript | 
| PhysicalDescription | Ink on paper | 
| AccessStatus | Open | 
Fellows associated with this archive
| Code | PersonName | Dates | 
| NA6042 | Stewart; Balfour (1828 - 1887); physicist and meteorologist | 1828 - 1887 | 
| NA8279 | Sabine; Sir; Edward (1788 - 1883) | 1788 - 1883 |