PHYSICAL CHARACTERS OE MIXTURES OE ALCOHOL AND WATER. 
593 
The following Tables give the results of the experiments. 
f denotes temperature of air. 
T denotes temperature of the steam-oven and consequently of the weight. 
t denotes temperature of calorimeter at beginning. 
if denotes temperature of calorimeter at end. 
v denotes loss of temperature during 30 s or 45 s . 
e denotes total corrected rise in temperature. 
N denotes the number of degrees expended by the heated weight in raising the 
liquid in the calorimeter one degree, the heat expended in raising the tem- 
perature of the calorimeter and immersed part of thermometer having been 
previously deducted. 
This figure, N, will therefore be directly proportional to the specific heat of the 
various liquids used, supposing, equal weights taken in each case. 
Table I. 
Brass ring , weight 264-49 grms. 
Brass value of calorimeter and immersed part of thermometer 69-54 grms. 
Quantity of liquid contained in calorimeter 449‘53 cub. centims. 
Time occupied in making each experiment, one minute. 
a. Distilled Water. 
Experiment. 
t". 
T. 
t. 
t'. 
. V. 
N. 
1 . 
9-0 
97-80 
10-048 
14-142 
0-020 
4-096 
20-14 
2. 
11-6 
97-83 
10-234 
14-297 
0-025 
4-088 
20-14 
3. 
12-1 
97-90 
10-568 
14-654 
0-005 
4-081 
20-11 
4. 
13-1 
98-10 
10-260 
14-369 
0-000 
4-109 
20-09 
Mean value of N 20T2. 
b. Spirit 10 per cent. Sp. gravity 0-9814. 
Experiment. 
t ". 
T. 
t. 
f. 
* 
e. 
N. 
5. 
12-4 
97-50 
10-522 
14-505 
0-000 
3-983 
20-92 
6. 
11-9 
97-87 
10-305 
14-351 
0-000 
4-046 
20-74 
7. 
13-9 
98-20 
11-593 
15-586 
0-000 
3-993 
20-85 
Mean value of N 20-836. 
Specific heat of 10 per cent, spirit 103-55. 
c. Spirit 20 per cent. Sp. gravity 0-9716. 
Experiment. 
if'. 
T. 
t. 
t'. 
* 
, 
N. I 
8. 
13-9 
97*5 
11-217 
15-184 
0-000 
3-967 
21-06 
9- 
13-9 
97-5 
11-825 
15-792 
0-000 
3-967 
20-90 
10. 
11-1 
98-1 
9-890 
13-974 
0-000 
4-084 
20-90 
11. 
12-9 
98-2 
10-486 
14-535 
0-000 
4-049 
20-97 
Mean value of N 20-957. 
Specific heat of 20 per cent, spirit 104-16. 
