| RefNo | MS/119/2/30 |
| Level | Item |
| Title | Letter from Charles James Buchanan Riddell, Woolwich to Humphrey Lloyd, Trinity College, Dublin |
| Date | 15 March 1842 |
| Description | Riddell has recently heard from [Frederick Marow] Eardley-Wilmot, and he has bought '12 yoke of oxen' in anticipation of the survey. Riddell informs Lloyd that his supplemental observatory is very compact and will send a description to [William James] Smythe and [Charles] Younghusband.
Riddell has been working on a portable magnetometer, and has written a description of it along with instructions for adjustments. This is to be printed with Mr [Robert Were] Fox’s instructions for the use of his dip circle.
Discussion on the declination arc which is to begin at once along with additional observations. Riddell discusses [Edward] Sabine’s comments on the topic. |
| Extent | 4p |
| Format | Manuscript |
| PhysicalDescription | Ink on paper |
| AccessStatus | Open |
Fellows associated with this archive
| Code | PersonName | Dates |
| NA7327 | Riddell; Charles James Buchanan (1817 - 1903) | 1817 - 1903 |
| NA8252 | Lloyd; Humphrey (1800 - 1881) | 1800 - 1881 |