| RefNo | MS/119/1/128 |
| Level | Item |
| Title | Letter from Edward Sabine, Woolwich to Humphrey Lloyd |
| Date | 22 April 1848 |
| Description | Sabine discusses the observations at Melville Island. Discussion on the needle’s poles being reversed and error of the dip. Sabine would like Mr [Henry] Barrow to adjust the needle, and discusses the total force achieved. Sabine discusses Lloyd’s suggestions of deflection distances at Melville Island and asks if 14 inches will be too small a deflection. Discussion of the earth’s force and the coefficient for the fourth term. Sabine is grateful that Lloyd has considered the values of p and q in the perpendicular plane. Sabine discusses [Thomas] Grubb’s nine inch bars and the 3,67 magnets used to obtain the coefficient by [John Henry] Lefroy. The earth’s horizontal force at Melville Island. |
| Extent | 8p |
| Format | Manuscript |
| PhysicalDescription | Ink on paper |
| AccessStatus | Open |
Fellows associated with this archive
| Code | PersonName | Dates |
| NA8279 | Sabine; Sir; Edward (1788 - 1883) | 1788 - 1883 |
| NA8252 | Lloyd; Humphrey (1800 - 1881) | 1800 - 1881 |