C O N T E N T S. vii 
Wales, !\ R. S. and Liefer of the Royal Mathematical School 
m Chrift’s Hofpital. p ( 
XXXI. Experiments on the Power that Animals , when placed in 
certain Circumfances , pojfefs of producing Cold. By Adair 
Crawford, M. D. ; communicated by Sir jofeph Banks, Beat. 
P T3 V r 
. 1 g * ^ p. 479 
XXXII. Account of a Comet . By Mr. Herfchel, A'. Ak o. • 
communicated by Dr. Watfon, J«». 0/' Bath, F. F. X. p. 4Q 4 
XXXIII. yf IV//rr from Mr. Jofeph Willard to the Rev. Dr. 
Malkelyne, Afronomer Royal , concerning the Longitude of 
Cambridge New England, " p, ^ 0 ‘ 2 
XXXIV. An Account of fome Lhermometrical Experiments ; con- 
taining, L Experiments relating to the Cold produced by the 
Evaporation of various Fluids , w/V/j * Method of purifying 
Ether . II. Experiments relating to the Expanfion of Mercury. 
III. Defcription of a Lhermometrical Barometer. By Tiberius 
Cavallo, F. R. S. who was nominated by the Prefdeut and 
Council to profecute Difcoveries in Natural Hifory , purfuant 
to the Will of the late Henry Baker, Eft. F. R. S . p. 509 
