of Meteorological Objervations. 251 
< 
combined, but only remains in a fate of folution 
. in the air, and confequently a greater degree of 
cold and diminution of the volume, and preffure or 
elafticity of the air, takes place. * 
Dumrrizs, May 1f. 1791. 
I SHALL now obferve in addition to what 
is above ftated, that after ten years farther expe- 
rience, and comparing thefe obfervations with the 
natural occurrences of the weather, I have always 
found them fufficiently applicable, fo far as general 
tules ought to be taken and admitted, on fo uncer- 
tain a fubjecd as the meteorological changes that are 
conftantly going on in an ifland like ours: for 
when a patch of earth is fituated like it in the midft 
of a great expanfe of furrounding fluid, whofe heat 
is nearly 45°. and at no time above three or four 
degrees higher or lower than that medium, whenever 
the atmofphere on that fpot requires a heat cons 
fiderably above that ftandard, it muit foon be re- 
duced to nearly the fame temparature, by the action 
of the furface of the furrounding fluid on the in- 
lig ferior 
s The preceding remarks were inferted in the Dum- 
fries Weekly Journal, publifhed Sept, 25th, 1781, 
