[ 587 ] 
THERMOMETRICAL EXPERIMENTS, See. 
IT AVING been appointed by the Preftdent and Conn- 
■*“ cil of the Royal Society to write the animal differ- 
tation, purfuant to the inflitution of henry baker, 
Efq. f. r. s. I determined to prefent to the Society 
the following account of fome thermometrical experi- 
ments and obfervations, the greateft part of which were 
made as long ago as the year 1776. The courfe of thofe 
experiments having been often interrupted by mechani- 
cal defebls in the conftruition of inftruments, and by 
various other circumftances, muft not be confidered as 
complete inveftigations of the propofed views, but rather 
as firft attempts, which are to be profecuted in cafe of 
better opportunities. They contain a few fails, which 
to me feem new and worthy of notice; and, perhaps, 
the obfervations concerning the conftruilion and ufe of 
the inftruments ufeful in experiments of this fort, may 
be of ufe to thofe perfons who have the opportunity, and 
are willing, to profecute this experimental inquiry. 
Vol. LXX. 4 H Having 
