J 48 



Gr.atom ') ■ and for ak = RT^X (27 : 8 ;) X bk the value 0,0665 

 with A = 0,955 (y := 1,09) ; cf. also IV, These Proc. of June 24, 

 1916, p. 307), so that y/ajc becomes — 25,8, i.e. 6,45 . IO-2 per Gr.atom. 



The value 7,8 found for f^ is somewhat lower than would follow 

 from f\=zSy, viz. 8,7, or 3,8 with ordinary log. 



The minimum lies at {Tk—T): Tk =r « : 2/? = 0,193, i.e. at T = 

 = 0,81 7\, or 183° lower than Tk, hence at 492° C, only slightly 

 below 504° C. And this minimum value of ƒ will evidently be 

 = fk — {'^' • 4/?) = 3,40 — (97,12 : 102,1) = 2,45.' We found above 

 the slightly lower value 2,43 with the value of 80 atm. for pj;, 

 which had been taken somewhat too low (80,7 atm. corresponds 

 namely with 675°,6). 



Fontanivent sur Clarens, March 1917. 



') From the critical data of PH3 would even follow 131 with H = 34 (cf. I, 

 These Proc. of Jan. 29, 1916, p. 1224). But these data are possibly not absolu- 

 tely accurate either. 



