ijo Mr . Cavendish’s Account of 
whole, it is not likely that the ftrengths of the decanted and 
undecanted parts here fet down fhould differ from the truth by 
much more than that quantity. 
The eighth column contains the freezing points found in* 
the fir ft method, or the temperature of the liquors after the 
huffy congelation which took place on expofing them to the 
cold without any frozen matter in them ; and the ninth con- 
tains their temperature after the more gradual congelation 
which took place when they were cooled with fome frozen 
matter in them ; and as the unfrozen part of the acid was 
decanted immediately after the temperature had been obferved, 
it follows, that this column lhews the true freezing points of 
the decanted liquors. In like manner the eighth column fhews 
the freezing points of that part of the liquor which re- 
mained fluid in the ffrft maimer of trying the experiment ; 
but as the ftrength of this part was not determined, the pre- 
cife ftrengths to which thefe freezing points correfpond are 
unknown. Thus much, however, is certain, that thefe points 
muft be below thofe of the whole mafs, and in all probability 
muff be above thofe of the decanted liquor; as there is. great 
reafon to think, that the quantity of frozen matter was always 
lefs, and confequently the ftrength of the fluid part differed 
lefs from that of the whole mafs, in the firft way of trying 
the experiment than in the fecond. 
Before I draw any conclufions from thefe experiments, it 
will be proper to take notice of fome particularities which 
occurred in trying them. 
N° 6. was made to congeal by a freezing mixture of fnow 
and diluted oil of vitriol. By the time the acid was cooled 
to — 42 0 , icy filaments were formed on the infide of the phial 
above the acid. Ten minutes after, the acid being cooled one 
degree 
