PHYSICAL CHARACTERS OF MIXTURES OF ALCOHOL AND WATER. 
601 
Table V. 
Water value of calorimeter, contents, &c. 1165*905 grms. 
For each degree Centigrade lost by the annular brass vfessel the temperature of the 
calorimeter was raised 0°*004 C. 
Time occupied by each experiment 5 minutes. 
a. Distilled Water. 
Experiment. 
m. t". 
T. 
t. 
1 r * 
V . 
e. 
Specific heat. 
62. 
87*485 1 
64-32 
10-630 
14-540 
0-020 
3-930 
99*90 
63. 
87*485 14-9 
63-70 
12*646 
16-389 
0-020 
3-763 
100-06 
64. 
87*485 15-4 
63-20 
12-480 
16-217 
0-020 
3-757 
101-20 
65. 
91-890 14-0 
62-64 
10-759 
14-762 
0-010 
4-013 
101-28 
Mean specific heat of distilled water 100*61. In the following experiments, however, 
which were made under similar conditions, the specific heat of water is assumed to be 
100 * 00 . 
b. Spirit 10 per cent. Sp. gravity 0*9814. 
Experiment. 
V. 
T. 
t. I f. 
* 
e. 
Specific heat. 
66. 
92*375 
14-9 
60-015 
12-535 16-285 
0-035 
3-785 
104-19 
67. 
92-375 
13-9 
59*30 
12-343 16-059 
0-030 
3-746 
104-25 
68. 
l 89-490 
13-2 
62-30 
11-578 15-485 
0-030 
3-937 
104-36 
69. 
89-490 
13-7 
61-80 
12-252 16-076 
0-030 
3-854 
104-60 
Mean specific heat of 10 per cent, spirit 104*35, or, assuming water to be 100*00, 
specific heat of 10 per cent, spirit 103*71. 
c. Spirit 20 per cent. Sp. gravity 0*9716. 
Experiment. 
ml 
t". T. 
t. 
t'. 
V. 
e. 
Specific heat. 
70. 
88*510 
14*7 ! 63*22 
12*950 
16-891 
0*024 
3*965 
105*09 
71. 
88-490 
15*5 61*62 
13*757 
17*502 
0*030 
3*775 
105-18 
Mean specific heat of 20 per cent, spirit found 105 13; or, assuming water to be 
100*00, specific heat of 20 per cent, spirit will be 104*49. 
After the foregoing experiments had been concluded, it was found that a somewhat 
similar series of experiments on the specific heat of mixtures of alcohol and water had 
been made by A. Schnidaritsch in the year 1859, and published in Wien. Akad. Ber. vol. 
xxxviii. p. 39, and Kopp and Will, Jahrb. 1859, p. 440. Schnidaritsch gives the specific 
heat of mixtures, from 10 per cent, to 10 per cent, by volume, from water to absolute 
alcohol ; his results, however, differ considerably from those given in this paper. From 
the latter it appears that the specific heat of such alcoholic mixtures, up to a strength 
of 36 per cent, of alcohol, is above that of water ; according to Schnidaritsch the specific 
