88 Mr Rudge, On the Specific Heat of Gases 
31 — 32, showing that the latent heat of the liquid at the critical 
temperature is zero. 
Table showing results of heating experiments. 
Apparatus + gas 
Apparatus - gas 
Apparatus + water 
Time 
Temperature 
Time 
Temperature 
Time 
Temperature 
0 
36-5 
0 
36-5 
0 
36-5 
2 
39-5 
2 
39-9 
2 
39-15 
4 
42-34 
4 
42-8 
4 
41-45 
6 
44-9 
6 
46-15 
6 
44-2 
8 
46-6 
8 
49-1 
8 
46-53 
10 
50-3 
10 
52-0 
10 
48-75 
12 
52-9 
12 
54-55 
12 
51-2 
14 
54-25 
14 
57-1 
14 
53-15 
16 
57-4 
16 
59-2 
16 
55-2 
Rise 
20-9° 
22-7° 
i—i 
00 
-it 
Rise for 10° 
13-8 
15-5 
12-25 
Let the rise in temperature 
of apparatus + gas = 0 1 , 
of apparatus — gas = 0 2 , 
of apparatus + water = 0 3 . 
The heat capacities are therefore in the ratio of 
_ 1 ._ 1 . 1 _ 
01 ' 02 'Of 
and if m = mass of gas or water and x = capacity of the apparatus, 
i.e. calorimeter, wire, thermometer, paraffin and bulbs, and 
S = specific heat, then 
111 
: ~q '• w ~ x + m ^ ■ x + m. 
t/ 1 t/ 2 ^3 
S = 
0 3 m 
0fi-0, 
{ 02 - 00 
0 1 m 
and inserting the numerical values from the table 
S = '45 nearly. 
