334 Mr. T. Tate on the Boiling-points of different Liquids 
Here the near coincidence of the results in the second and 
sixth columns shows that the experimental values of & and T 
may be approximately represented by the formula 
, | phesaae 
T= top h: - : a a0 sar ae 
Again, the near coincidence of the results in the third and 
seventh, fourth and eighth, fifth and ninth columns shows that 
in this group of salts the temperatures of ebullition have a con- 
stant ratio to each other for all equal weights of salt. 
The errors of these formule are probably within the limits of 
the errors of observation. Owing to the oscillations of the mer- 
cury column at the boiling-points of the liquids, the errors of the 
readings of the thermometer might amount to about one-fourth 
of a degree. 
These experimental results for the most part agree with those 
given by Legrand (see Dr. Miller’s ‘Chemistry,’ second edition, 
p. 247). 
Augmentations of boiling-temperatures, in degrees Centigrade, of 
different solutions of the salts contained in Group 2. 
If T and T’ be put for the augmentations of the boilmg-tempe- 
ratures of the solutions of the chlorides of calcium and strontium 
respectively for any equal portions of the salts dissolved, then it 
will be found that T’=-34T very nearly, as shown in the follow- 
ing examples :— 
(1) For k=16, T=2; then by the formula, ‘T’=1-08. 
By experiment, T’=1. 
(2) For s=64, T=16°8; then by the formula, T’/=9-07. 
By experiment, T’=9. 
(3) For £=96, T=27:2; then by the formula, T’=14°68. 
By experiment, T’ = 147, . 
(4) For £=112, T=82:3; then by the formula, T’=17+44, 
By experiment, T’=17°2. 
Augmentations of boiling-temperatures, in degrees Centigrade, of 
different solutions of the salts contained in Group 3. 
If T, T’, T” be put for the augmentations of the boiling- 
temperatures of the solutions of the nitrates of soda, potassa, 
and ammonia respectively, and 4, k', kK" the corresponding per- 
centage of salts respectively dissolved, then the following for- 
mule will be found to represent the results of experiments very 
nearly :— . 
T= gy k™; sf doe? | 
and for all equal weights of salt, 
