| RefNo | MS/312/1 |
| Previous numbers | MS/312 |
| Level | File |
| Title | Notebook, sunspot observations made at Kew Observatory, by Warren de la Rue |
| Creator | Rue; Warren de la (1815 - 1889); chemist and astronomer |
| Date | 1 January 1864-11 June 1864 |
| Description | Tables of astronomical observations recording sunspot activity, accompanied by albumen prints. Data recorded is the scale reading of the slide, scale reading centre, ratio of a/r, position, distance from the centre, corrected radius and corrected ratio.
Part of the Kew Observatory project to capture daily images of the sun and track sun-spots over time, using the photoheliograph built for this purpose by Warren de la Rue. This pursuit was first suggested by Sir Jon Herschel and executed by Warren de la Rue from February 1862 to late January 1871. During this time he took 2778 pictures of the sun on 1724 days.
Notes include occasional comments on the quality of individual photographs. Some annotations inserted in purple ink at a later date. |
| Language | English |
| Extent | 1 volume: pp. 1-179 |
| PhysicalDescription | Ink on paper. Contains photographic prints. Quarter bound in black leather, black cloth covered boards. Paper label on the front board: "Sun spot measurements Volume 1". Paper label to spine inscribed: "Sun-spot measurements 1864 Jan 1 to 11th 1864". |
| Dimensions | 192x222mm. |
| AccessStatus | Open |
| RelatedRecord | MC/7/113 |