I7 6 Mr. Hutchins’s Account of 
after which it fell gently to 430°, and did not go beyond 
this point. As this was a greater degree ot cold than 
that which Profeffor braum laid quickhlver would freeze 
at, I determined to break my fpare tube, which was ea- 
fily done by a ftroke with a pair of fciffars ; the quick- 
filver in a fall of about fix inches was flattened, and iorne 
olobuti appeared at the bottom of a tea cup in which it 
was received. This occafioned Mr. jarvis the lurgeon, 
who was lb obliging as to aflift me, to exclaim the quick- 
filver was not frozen; but when he law me repeatedly 
ftrike the cake with an hammer, and heard it give a 
deadifh found like lead, as M. braum juftly expreffes it, 
he receded from his firft opinion. The quickfilver li- 
quified in about fix or ten teconds. The iurface, when 
frozen, was finely polilhed. I imagine the internal part 
of the elobe was not frozen, and that the torce ot the ta 
having flattened it, might crack the external coat or Ihell 
of conoealed quickfilver, and permit the globuh which 1 
f aW to efcape into the cup. On taking the ftandard ther- 
mometer out of the mixture it fell 1 o" lower than when 
the bulb was immerfed ; but it foon began to atcend, and 
being taken into my room, it rofe to 40 above o, when 
l replaced it a little before noon. The operation laftcd 
about thirty or forty minutes. 
Having fucceededthus far in my firft attempt to liceze 
quickfilver, I was anxious for another opportunity; but 
fometimes bufinefs, and want of a fufficient degree of 
eld in the air at other times, obliged me to dctci it until 
the 1 ith of February, which was very clear, and the 
* ther^ 
