THERMAL EMISSIYITY OF THIN WIRES IN AIR. 
391 
Table IX. —continued. 
Diameter, 2 '9 mils, or 0'074 millim. Length, 28'85 centims. 
May 4th, 1888. Fig. 12. 
Water-jacket, 15°'6 C. 
Current, 
in amperes. 
P.D., 
in volts. 
Resistance, 
in olims. 
Equivalent 
temperature of 
wire. 
Emissivity. 
0-020 
0-1614 
8-070 
° C. 
19-1 
•000330 
0-030 
0-2426 
8-087 
19-7 
■000635 
0-040 
0-3268 
8-170 
22-8 
•000650 
0-050 
0-4120 
8-241 
25-3 
•000760 
0-075 
0-6266 
8-266 
26-2 
•001587 
o-ioo 
0-8471 
8-471 
33-5 
•001694 
0-150 
1-312 
8-748 
44-1 
•002472 
0-200 
1-817 
9-083 
56-5 
•003181 
0-250 
2-369 
9-476 
72-0 
•003753 
0-300 
2-989 
9-965 
89-5 
•004339 
0-350 
3-699 
10-569 
112-5 
•004774 
0-400 
4-574 
11-435 
146-2 
•005001 
0-450 
5-587 
12-415 
185-4 
•005283 
0-500 
6-817 
13-634 
234-2 
•005559 
0-550 
8-271 
15-038 
293-5 
•005829 
Diameter, 2 mils, or 0'051 millim. Length, 24'46 centims. Water-jacket, 13° C. 
April 4th, 1888. Fig. 12. 
Current, 
in amperes. 
P.D., 
in volts. 
Resistance, 
in ohms. 
Equivalent 
temperature of 
wire. 
Emissivity. 
0-06155 
0-7904 
12-842 
° C. 
19-0 
•004965 
0-08206 
1-0690 
13-026 
23-6 
•005068 
0-10258 
1-3619 
13-277 
29-4 
•005217 
0-13335 
1-8296 
13-710 
39-4 
•005660 
0-16413 
2-3281 
14-185 
50-2 
•006291 
0-19490 
2-8615 
14-682 
61-7 
•006999 
0-22568 
3-4639 
15-349 
77-2 
•007445 
0-25645 
4-1443 
16-160 
96-3 
•007804 
0-29748 
5-1115 
17T83 
121-1 
•008598 
0-33851 
6-532 
19-296 
173-4 
•008416 
0-38980 
8-351 
21-424 
227-0 
•009268 
0-44109 
10-834 
24-561 
306-0 
•009934 
