origin of the differential gear and its connection with equation clocks.
Contributors: Newcomen Society (Great Britain); Antiquarian Horological Society.
Publisher: The Society)
Published: 1957
Place of publication: (London
Language: eng
Number of pages: 11
Notes: Cover title.

Paper originally read at a joint meeting of the Newcomen Society and the Antiquarian Horological Society.

Reprinted from Transactions of the Newcomen Society, vol. XXX, 1955-56 and 1956-57.