PHYSICAL ann LITERARY. 169. 
finks very quickly eight or nine degrees 5” 
a good deal farther than it would have 
done in the fame circumftances ih the air, 
In the fame manner as in the air, the ther- 
mometer im vacuo may be made to fink 
lower by repeated dippings into the fpirit 
of wine: Buthere thefe repeated dippings 
_ have not fo remarkable an effect as in the 
air; becaufe the dipping cannot be fo 
- guickly performed, and the thermometer 
is therefore more affected by the warmth 
of the fpirit. It is fometimes alfo affect- 
ed by a drop of the fpirit which the ball 
takes up along with it, and which, as I 
fhould have obferved above, ought always 
to be taken away in the experiments made ° 
in the air. This experiment with {pirit of 
wine was often enough repeated, to fhew 
elearly, that the evaporation of the foirit 
im vacuo produces a greater degree of cold 
than the evaporation of the fame in the 
p sir. , ' | 
'SaTisFreD of this, I have tried alfo 
fome other fluids, as the quick-lime fpirit 
of fal, ammoniac, and the two kinds of | 
ether. Veffels containing thefe with a 
Sevo., li. ¥ ther- 
