*34 2 Mr. Hutchins's Experiments for ajoertainlng 
on the fecond, the apparatus, which had rifen a little before, 
funk fuddenly into the bulb. I have marked its prog-refs as £aft 
as 1 could catch it. Another extraordinary circumftance in 
this experiment is, that the mercurial thermometer (A) fhould 
not lubiide lower in the third than in the lecond mixture ; 
whereas the fpirit thermometer fhewed an equal degree of cold, 
while the quickfilver in the apparatus thermometer was in the 
bulb. At 1 1 h. 2 1 I took the apparatus out to examine it, and, 
by lhaking it in my hand, all of a fudden fome of the quick- 
lilver in the cylinder liquified ; the concuffion perhaps diflolved 
its folidity, for it was not above a minute out of the mixture. 
Wondering much at this unexpected phenomenon, as the quick- 
iilver in the thermometer did not rife, I put it into the mixture 
again immediately; but finding the inclofed thermometer 
fhewed no alteration, my curiofity determined me to examine it 
again ; therefore, about four minutes after, I took it out a 
lecond time, and found the fur face of the quickfilver in the 
cylinder was liquified about one-eighth of the whole quantity, 
as near as I could guefs ; the reft formed a folid ball, including 
the bulb of the thermometer, which ealily accounts for the 
quickfilver in that inftrument remaining ftationary. W'ifhingto 
obferve the whole procefs, and the cold being too fevere for the 
fame perfons to Hand in the open air for lo long a time, I de- 
fired one of my officers, with an affiftant, to mark down the 
obfervations at the times I went to warm myfelf, but by no 
means to make any alterations in my abfence; by this means 
the obfervations were continued regularly for near four hours. 
At the end of the experiments the thermometers (B), (C), 
(D), and (G), flood as follows, x8°|, 15 0 , 9 0 !, 15, which 
fhcws the alteration in the temperature of the air from the 
beginning. The thermometers (A), (D), and (F), were ufcd 
in the experiment. 
Experiment 
