334 
DR. E. H. GRIFFITHS AND MR. EZER GRIFFITHS ON THE 
value is given. The atomic heats were plotted on a large scale against absolute 
temperature and the mean curves drawn through the observations, the lines being 
prolonged through the experimental values of N ernst* or DewarI' at very low 
temperatures. 
Explanation of the Tables VI.-XIII. 
Column I.—The absolute temperature, T. 
Column II.—The specific heat at this temperature. 
Column III.—The atomic heat under constant pressure, which is denoted by G p . 
Column IY.—Value of G p at this temperature, as read from the smoothed curve. 
Column Y.—Difference, Column III. minus Column IY. 
Table YI.—Aluminium. (Atomic Weight: 27'1.) k 
I. 
II. 
III. 
IV. 
Y. 
T. 
Specific heat. 
C p (experimental). 
C p (curve). 
Difference. 
158-7 
0-1709 
4-63 
4-62 
+ 0-01 
191-5 
0-1867 
5-06 
5-06 
— 
273-1 
0-2096 
5-68 
5-68 
— 
301-5 
0-2147 
5-82 
5-82 
— 
324-1 
0-2184 
5-92 
5-92 
— 
370-6 
0-2248 
6-09 
6-09 
— 
Table YII.—Iron. (Atomic Weight: 55‘85.) 
I. 
II. 
III. 
IY. 
V. 
T. 
Specific heat. 
C p (experimental). 
C p (curve). 
Difference. 
140-3 
0-0770 
4-30 
4-29 
+ 0-01 
214-3 
0-0967 
5-40 
5-40 
— 
267-0 
0-1044 
5-83 
5-82 
+ 0-01 
273-1 
0-1045 
5-84 
5-86 
-0-02 
274-0 
0-1045 
5-84 
5-87 
-0-03 
283-1 
0-1060 
5-92 
5-93 
-0-01 
294-1 
0-1077 
6-02 
6-00 
+ 0-02 
297-6 
0-1080 
6-03 
6-02 
+ 0-01 
323-4 
0-1105 
6-17 
6-16 
+ 0-01 
339-4 
0-1112 
6-21 
6-23 
-0-02 
370-6 
0-1137 
6-35 
6-35 
— 
* Berlin, ‘ Sitz. Ber.,’p. 262, 1910; pp. 306, 316, 494, 1911; p. 1160, 1912. 
t ‘Roy. Soc. Proc.,’ A, vol. 89, p. 158, 1913. 
