An account of an horizontal top or whirling speculum, invented by Mr Serson
- Short, James
Manuscript transcription from the Philosophical Transactions of the Royal Society volume 47, p. 352 of James Short's paper. It refers to an artificial horizon or whirling speculum and explains an experiment to investigate the effect of a vacuum on a gyroscope. The account mentions Mr John Smeaton and Mr William Watson.
- Open Access