the Point of Congelation . 279 
i8°| for the freezing point of that folution. All the reft of 
the third column of the table is found in the fame manner, 
and with very little trouble, becaufe 4 x 28 = 1 12 is a conftant 
number, which being divided by the numbers of the firft co- 
lumn, the quotient is the number of degrees fought. In all 
the experiments, none but diftilled water was employed. 
Common Salt. 
Proportion 
Freezing 
Freezing 
of water to 
point by the 
point by cal- 
the fait. 
experiment. 
culation. 
3 2 : 1 
O 
2 9 
28f 
32 : 1 
28 + 
281 
24 : 1 
Z 4 * 
27! 
16 : 1 
0 r £ 
O* 
2 5 
10 : 1 
2li 
20f 
7,8 : 1 
18 1 
6,2 : 1 
14 
5 : 1 
9 i 
9 § 
5>5 : 1 
7 t 
7 
4 s 1 
4 
4 
The third column is calculated 
from the laft experiment, in 
which the freezing point of a 
folution of one part of fait in 
four of water proved to be 
+ 4 °- 
The numbers in the third column of the table come fo near 
to thofe in the fecond, that moft likely the fmall differences 
between them ought to be afcribed to errors in the experi- 
ment ; whence we fhould conclude, that the fait lowers the 
freezing point in the fimple inverfe ratio of the proportion 
which the water bears to it in the folution. 
In the courfe of the experiments made with the different 
folutions of this fait, fome phenomena occurred which delerve 
further attention. 
1. This folution was in oneinftance cooled 8§, and in feveral 
5 or 6 degrees, below its freezing point ; but in general it 
