466 RIESS ON THE INCANDESCENCE OF 
was placed by the side of the thermometer in the connecting 
circuit. 
Number Quantity Indication of 
of jars. of electricity. thermometer. 
$8. q: 6. a. 
4 6 12:5 1°39 
8 20°7 1:29 Vapour over the wire. 
9 23'8 1:17 The same. © 
10 ey ey 1:09 Bend in wire. 
ll 31°0 1:02 The same. 
12 36°0 1:00 The same. 
13 42°5 1:06 Wire is incandescent. 
= 41°8 0°99 The same. 
Experiment 46.—A platina wire, 16 lines long, radius 0°0396, 
was placed by the side of a less sensitive thermometer. 
Number Quantity Indication of 
of jars. of electricity. thermometer. 
S. q: 6. a. 
” 10 8-0 0°56 
LZ As) 0°45 
14 11°8 0°42 
16 13a” O37 
20 19°8 0°35 
oF 24°9 0°36 Wire is incandescent. 
24 26°7 0:33 The same. 
26 31°8 0°33 The same. 
28 32°6 0°29 The same. 
35 45:0 0°33 The wire is melted. 
Experiment 47.—A platina wire 17 lines long, radius 00209. 
Number Quantity Indication of 
of jars. of electricity. thermometer. ~ 
cae q: 6. a. 
Old battery. 
4* ey 76 1-32 
4 14-0 1°15 
9 20°0 0°99 Wire is bent. 
1l py 39 0°90 Wire is incandescent. 
13 Bins 0°80 Wire is white-hot. 
15 41°2 0°95 Wire is melted into 
globules. 
