PHYSICAL ANi) LITERARY. 153 



fluids evzporzte in vacuo as well as in the air, 

 I refolved to fufpend my opinion? till I 

 ihould repeat my experiniehts in an ex- 

 haufted receiver. 



In profecuting thefe, a number of new 

 and to me curious phce7Jomena have prefented 

 themfelves ; fo many, that I find the experi*- 

 ments muft be often repeated, and much 

 diverfified, before I can give the Society a 

 proper account of them. In the mean time, 

 I fhall give you the following facts already 

 fufficiently verified. 



A thermometer hung in the receiver of 

 an air-pump, finks always two or three de- 

 grees upon the air's being exhaufted. After 

 a little time, the thermometer in vacuo re- 

 turns to the temperature of the air In th& 

 chamber, and upon letting air again into the 

 receiver, the thermometer always rifes tu^o 

 or three degrees above the temperature of the 

 external air. 



When a vefiTel containing fpirit of wine, 

 with a thermometer Immerfed In it, is fet 

 under the receiver of an alri-pump j upon 

 exhaufting the air, the mercury in the ther- 

 mometer finks feveral degrees. It. becomes 

 more efpecially remarkable when the air in 

 Vol. II. U any 



