38 
TEOFESSOE W. A. TILDEN ON THE SPECIFIC HEATS OF METALS AND 
shown in fig. I. Cobalt has been omitted, as the metal apparently undergoes some 
oxidation at high temperatures and the results are less regular than the rest. 
Table 1. -Mean Specific Heats. 
Eange of temperature. 
+ 
° 0. 
-■ 182 to + 15 
— 78 ,, + 15 
15 „ +100 
15 „ 185 
15 „ 335 
15 ,, 
15 „ 
15 „ 
15 „ 
15 „ 
0 „ 
0 „ 
350 
415 
4.35 
550 
030 
1000 
1177 
Aluminium. 
Nickel. 
Col )alt. 
Silver. 
Platinum. 
• 1677 
• 0838 
■0822 
■0519 
• 0292 
•1984 
■0975 
■0939 
■0550 
■— 
_ 
• 1084 
•1030 
■0558 
■0315 
•2189 
•1101 
•1047 
•0561 
— 
•2247 
— 
— 
— 
_ 
•1186 
•1087 
•0576 
— 
_ 
•1227 
— 
.— 
.— 
• 2356 
•1240 . 
•1147 
•0581 
•03.38 
_ 
•1240 
•1209 
— 
—• 
•1246 
•1234 
— 
— 
— 
— 
— 
•0377* 
•0388* 
The general shape of the curves is the same and the connection between Q and t 
may Ije assumed as hy})erholic : 
C" “h "t~ + y = !*• 
The values of /t, = c/Q/c/C for the specific heats at successive temperatures on the 
absolute scale are given in the followfing table :—• 
Table 11.—Specific Heats. 
t aljs. 
“ V. 
100 
200 
300 
400 
500 
GOO 
700 
800 
900 
1000 
1100 
1200 
1 300 
1100 
1500 
Aluminium. 
122G 
1731 
2053 
2254 
2384 
2471 
2531 
Nickel. 
•0575 
•0878 
•1054 
■ 1168 
•1233 
•1275 
•1301 
•1321 
•1338 
Silver. 
•0467 
•0528 
•0558 
•0572 
• 0581 
•0587 
• 0590 
Elatiimm. 
0275 
0293 
0311 
0328 
0344 
0358 
0372 
0385 
0397 
0409 
0421 
0432 
0442 
0452 
0461 
One important result of the extension of tlie experiments to other metals is that 
the assum])tion of a constant atomic heat at the absolute zero, which seemed justified 
■*' Yiui.lk, ‘ Comiites Eemlus ’ (1877), vol. 85, p. 543; ;ilso ‘ Ehil. iM:ig. [5], vul. 4, j). 318. 
