2 62 Mr. Cavendish’s Account of fame 
congelation is 31°!, and at ,33 probably — 45*1 ; at leaft one 
kind of congelation takes place at that point, and there is little 
doubt but that it is of the fpirituous kind. In order to prefent 
this matter more at one view, I have added the following 
table of the freezing point of common fpirit of nitre answering 
to different ftrengths. 
Strength. 
Freezing 
point. 
> 54 - 
0 
~ 3 l i 
, 4 t! 
- if* 
,38 
-45! 
>243 
~ 44i 
,21 
- 17 
| fpirituous congelation, 
j aqueous congelation. 
20. In trying the firft half of the dephlogifticated fpirit of 
nitre, the cold produced was —44°!. , The acid was fluid be- 
fore the addition of the fnow, and of the temperature of —30°, 
but froze on putting in the thermometer, and rofe to - 5 0 , as 
related in Art. 7. 
In trying the fecond part, the acid was about o° before the 
addition of the fnow, and therefore had no difpofition to freeze. 
The cold produced was — 42T . 
As the quantity of fnow added in thefe experiments was not 
fobferved, they do not determine any points of aqueous or fpi- 
rituous congelation in this acid ; but there is reafon to think, 
that thefe points are nearly the fame as thofe of common fpirit 
of nitre of the fame ftrength, as the cold produced in thefe 
experiments was nearly the fame as that obtained by the com- 
mon fpirit of nitre. 
* The point of eafiefl freezing. 
On 
