EXPERIMENTS, &<v 
Gray’s-Irm, 
April 25, 1776. 
R * ^'T'HE late henry baker, Efq. a worthy 
member of this honourable Society, full 
of laudable zeal for the advancement of natural know- 
ledge, has moft generoufly bequeathed the fum of one 
hundred pounds, for the ufe of this refpe£table body; the 
intereft of which he intended fhould be annually applied 
for the benefit of fuch member whom the Council of 
this Society thought proper to nominate, for the talk 
of making difcoveries in natural hiftory. Thefe gentle- 
men have this year done me that honour, which I molt 
gratefully acknowledge ; and in confequence of this ap- 
pointment, I have made experiments on a variety of mi- 
neral fubftances. 
4 
IN 
