| RefNo | AP/26/5 |
| Level | Item |
| Title | Unpublished letter, 'Concerning the invention of sempiternal motion upon Earth' from William Herschel de Griesbach to Sir John Lubbock |
| Creator | de Griesbach; William Herschel (fl 1843) |
| Date | 30 January 1843 |
| Description | De Griesbach explains that in the summer of 1820 he first began to entertain the idea that the invention of sempiternal motion upon Earth was possible. He describes sempiternal motion as 'having a beginning, but no end', therefore preferring this term to 'perpetual motion'. He writes on the importance of the centripetal and centrifugal force on the Earth.
Subject: Astronomy
Written by de Griesbach in Vegesack, Bremen [Germany]. |
| Extent | 9p |
| Format | Manuscript |
| PhysicalDescription | Ink on paper |
| Digital images | View item on Science in the Making |
| AccessStatus | Open |
Fellows associated with this archive
| Code | PersonName | Dates |
| NA7010 | Lubbock; Sir; John William (1803 - 1865) | 1803 - 1865 |