( 39:. ) 



■i- = o y ^ J.OOCVI. 



0,1 1,004Ö'J 



0,2 l.OOSÜG 



0,:j 1,00303 



0,4 1,00220 



0,5 1,00149 



(»,() 1,000S9 



0,7 1,Ü003'J 



0,8 1 



0,9 0,99972 



1 0,99954 



By application of tlie approximated t'onmila 



(35,8 — i)) f^ z=. üx — hi{\ A^ at) 

 we fiad from the series of observations 



X = 0,0995 y = 1,C04S3 



e = 0,1990 1,00398 



X — 0,3528 1,00270 



X = 0,4993 1,00177 



X = 0,6143 1,00093 



X = 0,79G3 1 



X ~ 0,8972 0,99965 



Only at x = (j,5 a deviation of imjiortauce is found. 

 For « = 18° we may calculate from 



cix—bx (1 4- cct) z= — 0,000454 + 0,0011«9 (1—^) + 0,005405 {l—x)" 



the value «12—^12(1 +«0 — ^.0001375 and 



«1 + «2 — 2 «12 — (^1 + ^2 — - ^12) (1 + « = 0,005404 . 



According- to this value of «n— ii2(l + «0 the deviation i) from 

 the law of Dalton would be in the usual direction, i. e. in such 

 a way that the pressure of the mixture at larger volum.es is smaller 

 than the sum of the separate pressures, whereas at smaller volumes 

 the sign of the deviation is reversed. In consequence of the small 

 value of «12— ijn (1 + «0 = 0,0001:375, the deviation will be but 

 slight. We may examine whether this is confirmed by the observa- 

 tions of Mr. Veuschafi'elt (table XII), if .f = ^V So for v = 0,03 



') See Proceedings of Nov. 1898. 



27* 



