1887.] Mr A. Campbell on Measurement of Peltier Effect. 409 
Table XXI. — Joule Effect in Nickel. 
Temperature. 
Pile Deflection 
D. 
D 
C2. 
Whole per 
cent In- 
Mean In- 
crease per 
Same 
Corrected. 
crease. 
cent, per 1° C. 
14° -2 C. 
996-3 
924-7 
151°*9 
928-3 
1396-5 
50-7 
•3681 
•386 
16°*4 
1037-5 
989-7 
... 
... 
« • • 
97°'0 
987-25 
1268-6 
27-14 
•3367 
•343 
169°-4 
933-8 
1519-2 
53-5 
•3497 
•369 
223° -6 
882-9 
1747 
76-5 
•3681 
•388 
280° -8 
990-7 
1918 
93-8 
•3646 
•385 
Table XXII. 
— Joule Effect in German Silver. 
Temperature. 
Pile Deflection 
D. 
D 
C2. 
Whole per 
cent. In- 
crease. 
Mean In- 
crease per 
cent.perl°C. 
Same 
corrected. 
14°-6* 
1046 
2357 
0 
13°'8 
1303-4 
2295 
0 
. 0 0 
0 O 0 
80° -0 
1022-4 
2291 
-0-2 
- -003 
•0139 
127°‘4 
1054 
2289 
-0-26 
- -0023 
•0155 
142° -0* 
1253-9 
2322 
-1-1 
- -008 
•0098 
181°-6 
977-5 
2155 
-6-09 
- -0303 
-•0118 
262° -3 
919-75 
2079 
-9-43 
- -0380 
- -0184 
Table XXIII . — Change of Resistance of German Silver. 
Temperature. 
Whole per cent. Increase. 
Mean Increase per cent, 
per 1° C. 
17°T C. 
0 
95°-3 
1-93 
•025 
122° -6 
3-00 
•0280 
158°-6 
3-78 
•0267 
193°-4 
5-07 
•0288 
197°-6 
5-64 
•0311 
328° -2 
10-0 
•0321 
r 281°-0 
9-71 
•0368 
275° *0 
9-54 
•0370 
Table XXIY. — Changes of Specific Heat. 
Cadmium. 
Mean Increase per 
cent, per 1° C. from 
18° C. to 
Iron. 
Mean Increase per 
cent, per 1 ° C. from 
18° C. to 
Nickel. 
Mean Increase per 
cent, per 1° C. from 
18° C. to 
German Silver. 
Mean Increase per 
cent, per 1° C. from 
14° C. to 
1 10° *8 
•02 
110° 
•161 
97° 
•056 
80° 
•009 
122°-2 
•072 
122° 
T70 
152° 
•05 
127° 
•0115 
143° -8 
•076 
144° 
T88 
170° 
•091 
142° 
•0182 
173° -0 
•168 
173" 
•215 
224° 
•106 
181° 
•0297 
... 
... 
... 
280° 
•175 
262° 
•0505 
* These two belong to a separate set, and therefore the percentages for 
142 o, 0 C. given are taken from 14° '6 C. 
