199 — 
The liquid taken was water and the solid was glass. The 
water was heated to the boiling point and placed in the appa- 
ratus Fig. III. The sphere from which the water fell was the 
bulb of the thermometer which measured the temperature. 
Fully the upper half of the sphere was covered with cotton 
wool so that the whole of the sphere was kept wet. The con- 
siderable mass of mercury in the bulb of the thermometer or 
dropping-sphere itself served to make more uniform the tem- 
perature of the drops : while the actual contact between these 
and the spherical bulb insured a tolerably close approxima- 
tion between the actual temperature of the drops and that in- 
dicated by the thermometer. Though the temperatures observ- 
ed cannot therefore pretend even to approximate positive ac- 
curacy : yet they are certainly in the actual order of magni- 
tude. The arrangement is seen in Fig. YI. 
TABLE XIII. 
mm 
Water, gt. — 2” r. — 7 A. Number of drops 20. 
Relative mean size 
Temperature 
Weight of 
Weight of 
of single drop, 
corrected for tern- 
Centigrade. 
twenty drops. 
single drop. 
perature. 
r 44.i 
2.5564 
0.12782 1 
40.3 J 
40 
2.5795 
0.12897 
> 
0.12985 
[37 
2.5826 
0.12913 
f35 
2.6083 
0.13041 1 
33.9 
2.6105 
0.13052 
32.6 
2.6161 
0.13080 
31.2 
2.5960 
0.12980 
30.6<I 
30.6 
2.6065 
0.13032 
► 
0.13066 
29 
2.6044 
0.13022 
28.2 
2.5983 
0.12992 
28 
2.6078 
0.13029 
[27.5 
2.6032 
0.13016 J 
20.4- 
-20.4 
2.6480 
0.13240 
0.13262 
