382 
MESSRS. W. E. AYRTON AND H. KILGOUR ON THE 
Table IV. 
July 16th, L888. Diameter, 11 ‘I mils, or 0‘282 millim. Length unknown. 
Curve No. 3, fig. 7 (Plate 11). 
Temperature. 
Resistance, 
in olims. 
Temperature. 
Resistance, 
in olims. 
Temperature. 
Resistance, 
in ohms. 
° C. 
° C. 
°C. 
15-9 
G'4496 
0-577 
222-1 
0-711 
40-9 
0-483 
141-9 
0-609 
238-2 
0-731 
59-9 
0-507 
150-3 
0620 
255-2 
0-752 
68-2 
0-518 
162-6 
0-635 
272-0 
0-771 
79-1 
0-532 
175-4 
0-650 
291-4 
0-792 
89-2 
0-545 
187-6 
0"665 
0-809 
100-5 
0-560 
200-7 
0-6801 
292-5 
0-792 
0-569 
209-6 
0-695 
273 1 
0-771 
The curves recording the results given in Tables III. and IV. are shown in Curves 2 
and 3, fig. 7. 
Table V.—Piece of Platinum Wire that had been used in Experiments on 
Emissivity. 
July 27th, 1888. Diameter, 9’3 mils, or 0'236 millim. Length, 20T9 ceutims. 
Temperature. 
Resistance, 
in ohms. 
Temperature. 
Resistance, 
in ohms. 
Temperature. 
Resistance, 
in ohms. 
°C. 
°C. 
°C. 
19-2 
0-6844 
150-8 
0-905 
276-5 
1-104 
48-5 
0-736 
175-0 
0-945 
293-3 
1-130 
79-2 
0-789 
207-2 
0-996 
304"0 
1-145 
97-4 
0-820 
232-4 
1-035 
July 
30th. 
113-0 
0-847 
256-9 
L065 
17-3 
0-678 
July 20th, 1888. Diameter, 8T mils, or 0’206 millim. Length unknown. 
Temperature. 
Resistance, 
in ohms. 
Temperature. 
Resistance, 
in ohms. 
Temperature. 
Resistance, 
in ohms. 
°C. 
c. 
0 C. 
18 1 
0 6191 
112-5 
0'805 
301 0 
1-138 
43-7 
0-670 
205 "6 
0-971 
295-8 
1130 
62-8 
0-707 
232-9 
1-020 
265-9 
1-079 
78-1 
0-737 
262-9 
1075 
254-8 
1-059 
94-8 
0-770 
284-3 
1-110 
104-7 
0-790 
295-2 
1-128 
? • 
