THERMAL EMISSIVITY OF THIN WIRES IN AIR. 
383 
July 26th, 1888. Piece of the preceding wire. Length, 18’54 centims. 
Temperature. 
Resistance, 
in ohms. 
' Temperature. 
Resistance, 
in ohms. 
Temperature. 
Resistance, 
in ohms. 
°C. 
° C. 
°C. 
19-0 
0-6184 
106-3 
0-790 
216-9 
0-990 
42-4 
0-6G5 
114-0 
0-805 
233-3 
1-020 
58-9 
0-697 
149-2 
0-865 
251-9 
1-055 
691 
0-717 
160-0 
0-885 
274-7 
1-095 
79-2 
0-737 
170-7 
0-905 
284-1 
1-110 
89-4 
0-757 
187-0 
0-935 
961 
0-770 
206-5 
0-971 
July 12th, 1888. Diameter, 6 mils, or 0J52 millim. Length, 17'07 centims. 
Fig. 14. 
Temperature. 
Resistance, 
in ohms. 
Temperature. 
Resistance, 
in ohms. 
Temperature. 
Resistance, 
in ohms. 
° C. 
° 0 . 
°C. 
14-8 
1-047 
1311 
1-445 
266-7 
1-885 
32-7 
1110 
153-7 
1-520 
273-2 
1-905 
45-0 
1153 
160-1 
1-541 
280-0 
1-925 
53-85 
1-183 
176-8 
1-595 
289-0 
1-950 
61-8 
1-210 
183-2 
1-616 
294-8 
1-967 
73-0 
1-248 
195-2 
1-657 
302-0 
1-988 
81-0 
1-276 
202-5 
1-680 
306-0 
2-000 
93-3 
1-318 
213-7 
1-715 
309-0 
2-010 
102-8 
1-352 
224-7 
1-750 
311-0 
2-015 
110-2 
1-377 
231-3 
1-772 
305-0 
1-995 
112-5 
1-385 
240-0 
1-800 
1140 
1-390 
250-5 
1-835 
149-2 
1-0475 
126-7 
1-426 
257-0 
1-855 
July, 19th, 1888. Diameter, 4 mils, or 0T02 millim. Length, 15'37 centims. 
Curve 4, fig. 8 (Plate 11). 
Temperature. 
Resistance, 
in ohms. 
Temperature. 
Resistance, 
in ohms. 
Temperature. 
Resistance, 
in ohms. 
°C. 
"C. 
°C. 
173 
4-127 
113 
4-645 
233-5 
5"245 
42-4 
4-265 
147-7 
4-815 
253-4 
5345 
76-0 
4-445 
163-5 
4-895 
273-8 
5 "445 
94-5 
4-545 
183-1 
4-995 
280-3 
5’475 
103-6 
4'595 
207-8 
5-115 
The smallness of the variation of resistance of the last wire with temperature 
shows that it is not a pure platinum wire, and that it possibly contains a trace of 
silver or iridium. 
