181 
BETWEEN THE FREEZING AND BOILING-POINTS. 
Table IX.—Comparison of Platinum-Silver ohms, with 4086 taken as 
1 ohm at 20° C. 
Coil 1. 
Coil 2. 
Date of 
comparison. 
Tempera¬ 
ture of 
comparison. 
Resistance 
at tempera¬ 
ture of 
comparison. 
Resistance 
corrected to 
20° C. 
Tempera¬ 
ture of 
comparison. 
Resistance 
at tempera¬ 
ture of 
comparison. 
Resistance 
corrected to 
20° C. 
1898. 
0 
o 
May 26th . 
19 • 2 
1-00113 
1-00133 
19-4 
•99983 
•99999] 
p 
„ 28th . . . 
20-9 
1-00158 
1-00136 
20-9 
1-00017 
•99995 
<p g 
„ 31st . . . 
20-8 
1-00146 
1-00127 
20-9 
1-00021 
•99999 
o £ i 
June 11th . 
16-9 
1-00053 
1-00131 
18-1 
•99956 
1-00002 
m n 
rO ^ 
,, 25th. . . 
20-8' 
1-00147 
1-00128 
20-9 
1-00023 
1-00001J 
° cc 
j 
September 10th . 
19-1 
1-00112 
1-00133 
19-2 
•99981 
1-00000' 
1899. 
a5 
W 
£ 
P3 
February 22nd . 
15-6 
1-00022 
1-00132 
15-9 
•99900 
1-00000 
May 8th . 
17-5 
1-00071 
1-00133 
17-6 
•99939 
•99998 
PP 
August 9th . 
19-4 
1-00118 
1-00133 
19-5 
•99988 
1-00000 
September 21st . 
17-0 
1-00059 
1-00134 
17-0 
•99930 
1-00003 
CD 
October 4th . 
15-2 
1-00016 
1-00135 
15-3 
•99889 
1-00004 
5 
w 
1900 
o 
May 26th . . . 
16-9 
1-00056 
1-00133 
16-S 
•99926 
1-00005 
Means . ., . 
18-27 
— 
1 00132 
18-46 
— 
1-00001 
Table X.—Temperature Coefficient of Platinum-Silver ohms. 
Coil 1. 
Coil 2. 
Temperature 
of Pt-Ag 
coil. 
Difference from 
4086 at 20° in 
ohms. 
Calculated 
from curve. 
Temperature 
of Pt-Ag 
coil. 
Difference from 
4086 at 20° in 
ohms. 
Calculated from 
curve. 
° 
211 
+ -001590 
+ -001590 
o 
21-0 
+ -000258 
+ -000250 
IN 
14-0 
- -000242 
- -000200 
13-0 
- -001741 
- -001750 
k £ £ 
f cd pS 
6-5 
- -002027 
- -002055 
6-9 
--003170 
- -003220 
js < 
OW 
20-0 
+ -001337 
+ -001310 
20-3 
+ -000070 
+-000070] 
Q 
19-9 
+ -001245 
+ -001290 
19-3 
- -000190 
- -000190 
> 8 
12-8 
- -000458 
- -000495 
14-5 
- -001345 
- -001375 
> J—1 Lej 
<d £ 
8-7 
- -001346 
- -001520 
11-4 
- -002130 
- -002130 
to pj 
^ s 
O w 
^ m 
5-3 
1 
- -002417 
- -002370 
5-9 
- -003497 
- -003490 
