.304 Mr Wilson’s farther Experiments on Cold, 
the fnow colleded from the furface. But in oppofition to both 
thefe views it remains now to be mentioned, that nothing of 
this kind did appear in the courfe of the experiments, which 
indeed were contrived chiefly to deted fuch circumhances. 
If therefore the arguments produced in both papers upon 
this fubjed will not allow us to account for fo remarkable a 
cooling procefs by an evaporation at the furface of the fnow, 
it would appear, that there remains hill fomething unknown 
with refped to the caufe. A proper inveftigation of this mat- 
ter, in climates favourable to fuch experiments, may poffibly 
unfold fome farther properties of heat with which at prefent: 
.we may be wholly unacquainted. 
/ 
