318 
Proceedings of the Royal Society 
We also examined gelatine in the form of a dry jelly, isinglass 
as a jelly wet to the touch, and gum arabic as a viscous solution. 
The following were the results obtained : — 
Gelatine. 
Temp. 
in 
Degrees 
Centi- 
grade. 
Thermal Effect on applying Pressure. 
Thermal Effect on relieving Pressure. 
Pressure. 
Deflec- 
tion. 
Temp. 
Raised. 
Rise 
per Ton. 
Pressure. 
Deflec- 
tion. 
Temp. 
Lowered. 
Fall 
per Ton. 
15 ° 
24-4 
1-34 
0°'29 
0°'27 
24-1 
1*26 
0 o, 27 
0°-25 
47 
2’5 
ip 
o 
O 
0°’26 
47 
2-7 
00 
lO 
o 
00 
<N 
o 
67 
3-4 
o 
0°’25 
63 
3-6 
0°'78 
0°-28 
Isinglass. 
14°-3 
21*4 
1-0 
0°-21 
0°-22 
22 
1-0 
0°-21 
0°*22 
48 
2-04 
0°-43 
Cf -21 
48 
2*24 
0°-47 
0°‘22 
67*5 
3-0 
0°”65 
0 o> 22 
66 
3-0 
0°-65 
0°-22 
Gum Arabic. 
17 ° *3 
24-2 
1*81 
0°-39 
0°-36 
24*2 
1-88 
0°'41 
CO 
00 
o 
o 
45-7 
3-27 
0 ° 71 
0°'35 
44-6 
3-5 
0°-76 
0°‘38 
66-9 
4-69 
l °-02 
0°-35 
661 
5-25 
1°14 
0°-39 
Chloroform {Specific Gravity , 1 *497). 
15°-5 
23-3 
6-25 
1°*49 
l °-44 
22-5 
61 
l °-45 
l °-45 
17 ° 
46 
11-46 
2° -73 
l °-34 
45 
12'2 
2°‘90 
l °-45 
66 
16-2 
3° -85 
1°-31 
69 
19 
4°-52 
T -47 
The following liquids, lighter than water, were examined in the 
manner already explained : — 
