1887.] Mr A. Campbell on Measurement of Peltier Effect. 407 
and (3) ; the deflections, however, are represented on a scale 
one-third larger than they actually were. 
Table XV . — Joule Effect in Copper Strip. 
Time, 
| Seconds. 
Deflection. 
Time, 
J Seconds. 
Deflection. 
Time, 
| Seconds. 
Deflection. 
Time, 
£ Seconds. 
Deflection. 
3-6 
19 
154 
1119 
310-5 
219 
462 
1119 
6-5 
69 
160-6 
1069 
313 
269 
465-2 
1069 
9 
119 
162-6 
1019 
315-3 
319 
467-5 
1019 
13-5 
169 
165 
969 
317-6 
369 
470 
969 
16 
219 
168-2 
919 
320-5 
419 
473-2 
919 
18 
269 
170-6 
869 
323-5 
469 
475-5 
869 
22-5 
319 
173 
819 
325-3 
519 
478 
819 
24-3 
369 
176-5 
769 
329 
569 
480-7 
769 
27 
419 
179-2 
719 
331-6 
619 
483-7 
719 
30-3 
469 
182 
669 
334-3 
669 
487-5 
669 
32-6 
519 
185-3 
619 
338 
719 
491 
619 
35-5 
569 
189 
569 
341-3 
769 
495 
569 
39-3 
619 
193 
519 
345-6 
819 
499 
519 
43 
669 
197-5 
469 
350 
869 
505 
469 
47 
719 
201-6 
419 
355-6 
919 
510-5 
419 
51-2 
769 
208 
369 
361 
969 
518 
369 
57-6 
819 
214-6 
319 
367-5 
1019 
526 *2 
319 
62-5 
869 
221-6 
269 
375-7 
1069 
536-5 
269 
69-2 
919 
230-5 
219 
385-6 
1119 
551-5 
219 
76-6 
969 
245-3 
169 
401 
1169 
581 
169 
87 
1019 
265-6 
119 
426 
1219 
• • • 
101-5 
1069 
300 
74 
450 
1249 
• • • 
... 
125-5 
1119 
305 
119 
457-3 
1219 
... 
• . • 
150 
1199 
308 
169 
460 
1169 
... 
... 
In the tables which follow are given the measurements of the 
resistance and Joule effect, and the changes in specific heat deduced 
from them. In the case of the iron and cadmium the Joule effects 
were measured at the same time, iron being at one end of the 
thermopile and cadmium at the other. Also in this case the battery 
current was measured by the Joule effect in iron strips round the ends 
of another thermopile. With regard to the results for German 
Table XVI . — Change of Resistance of Cadmium. 
Temperature. 
Whole per cent, 
increase. 
Mean increase per cent, 
per 1° C. 
12° -8 C. 
0 
0 
78° -2 
12-53 
•3863 
81°-1 
12-65 
•3880 
97°'8 
13-22 
•3788 
104° -2 
13-55 
•3885 
130°-0 
14-07 
•3472 
137°-8 
14-96 
•3968 
152° -2 
15-56 
•3988 
154°-4 
15-52 
•4000 
!75°-5 
16 48 
•4052 
