✍ Scribed by W.H. Keesom; B. Kurrelmeyer
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The atomic heat of iron has been measured between 1.1 and 20.4'K. The results are in agreement with the law C, = y T + bTS, with y = 1.20 x 1 O+ cal/mol. deg.' and b = 4.70 x lo+ cal/mol deg'. This value of b corresponds to a characteristic temperature of 462°K. The value of y is discussed from the point of view of S t o n e r's theory. *) On leave of absence from Brooklyn College, Brooklyn, N.Y.,
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This paper deals with measurements concerning the atomic heat of aluminium. It appears that above the normal transition point from the superconductive to the non-superconductive state the atomic heat can be represented by Cv = D (419/T) + 0.0003484 T cal/degree mol. Discussion shows that the densit
We thank Dr. d e B o e r for his communication of this result. We assume that this will give the correct order of magnitude for Ni. 2) Cf. E. g. A. Sommerfeld and H. Bethe, Hdb. d. Physik 24 (2), 430, eq. (17.I).
The specific heats of four copper-nickel alloys, containing approximately 20, 40, 60 and 80 per cent of copper respectively, and of three ironnickel alloys, containing approximately 15, 20 and 50 per cent of iron respectively, have been measured 'in the temperature ranges obtainable with liquid heli
T h e h e a t c a p a c i t y of Gd2(SO4) 3 . 8 H 2 0 was m e a s u r e d f r o m 1.0 to 20.5°K. I t s a n o m a l o u s t h e r m a l b e h a v i o r , e x p e c t e d f r o m t h e o r e t i c a l c o n s i d e r a t i o n s a n d first d e m o n s t r a t e d b y K t i r t i in t h e liquid h e l