*3 5 6 Mr. hutchins’ s Experiments for ajcertainlng 
When I removed the thermometer (A) out of the mixture at' 
9 h. 5', 1 hung it up in the air, and have noted down, in a fe- 
parate column on the right-hand fide of the page, its appearances 
correlponding to the times put down on the other fide of the 
page. It is remarkable, that (A) and (C) have each an air-bubble 
blown at the top ; but the thermometer (B) had none. 
Whilft the inftruments were ldationary in the foregoing ex- 
periment, I put the apparatus (F) and (G) feverally into the 
mixture with the others ; the confequence was, that in two mi- 
nutes the quickfilver in the cylinder was frozen folid ; but as 
there was a difference in the effeft I fhall be more particular. 
At 9 h. 48' put in apparatus (F), when it Hood in the air at 40° 
or 41 0 below o ; and at 9 h. 50' took it out frozen folid, and the 
inclofed thermometer pointing flill at 40° or 41 0 . I then hung 
it up in the open air, and looked at it only now and then. At 
10 h. 47' (after being expofed to the air near an hour), I found 
only a final! quantity of the furface of the quickfilver was fluid, 
the reft was a frozen globe refembling a ball of polifhed filver ; 
the thermometer inclofed was ftill at 40°. At 1 1 h. 4' I ob- 
ferved a fegment of a globe of folid quickfilver ; in the infide was 
a concavity made, I fuppofed, by the bulb of the thermometer. 
The thermometer was flill at 40% which undoubtedly is the 
freezing point of quickfilver, as in this inflance part of it was 
frozen, and part folid. I withdrew the thermometer, poured 
out the fluid quickfilver, and returned the thermometer into the 
cylinder, fhortly after which it was at 37°, and the frozen feg- 
ment was then fluid. 
The apparatus (G) was hanging in the open air at 40°, and 
put into the fame freezing mixture at 9 h. 5 l 7 , on which it 
dunk inftantly to 210% at which degree it was flationary at 
9 h. 
