1 matching record(s)
file W (Cope)Lloyd, H. Alan
"Description of a clock by John Shelton, owned by the Royal Society and used by Maskelyne on his visit to St. Helena in 1761, and probably by Mason and Dixon in Pennsylvania"
offprint from Proceedings of the American Philosophical Society, vol. 94 no. 3, 1950, pp. 268-271. (Offprinted with a companion article by Thomas D. Cope, pp. 260-268 [see separate entry]).
[Unknown]
1950