(8 1) 
the Flasks out of the hot Water, and putting that 
which held the Water into a Cylindrick VefTel that 
had three Pints of cold Water in it, l did at the fame 
time plunge the Flask with Mercury into another Cy- 
lindrick Veftel containing alfo three Pints of cold Wa- 
ter, and obferv’d which of the cold Waters was mod:; 
heated in the following manner 
A little Thermometer being held in the firft VefTel 
of cold Water fo as to have its Ball cover’d with 
the Water, upon the putting in the Flask of warm < 
Water, the Spirit rofe z degrees ; then putting the 
Thermometer into the Water where the Flask that 
had the Mercury was, the Spirit roie three degrees 
higher. The Thermometer being again put into the 
firft Veftel fell 4 degrees, and afterwards again 
into the daft it rofe almoft 3 degrees. . 
This (hews that more heat is communicated by 
warm Mercury , than by an equal Bulk of Water e- 
qually warm'd ; and therefore that there is more mat- 
ter in the Mercury ; but how much more matter there 
is in the Mercury is not determin’d by this Experi- 
ment alone- 
N. B. The warm Mercury and the warm Water were 
not pour’d into the cold; but only communicated.: 
their heat thro’ the Flasks. 
An 
