( 577 ) 



./ = 500, A,, = 1100 \\(' liiid al 2.S00 aim. a.-aiii A„ = 4i;4. So wc^ 



may assume willi itcrfccl ccrlaiiily A„ lo dillrr \rr\ lilllc from -XiVA. 



Willi lliis value (»r A„ ill llic lirst place //,, was auaiii calciilaled. 

 From (li follows: 





= 1 



t" — /; V — b 



ISO 



^-^, =(/'-/'„) 



i—b 



111 tiiis way 1 found al />=500, ()00. 700. SOO, 900, 1000, J200, 

 J400, 1()00, 1800, 2000 aim. i-espcrlively /,,, = \)[H, 1IL7, 1)14, ".)J2, 

 9J2, 913, 919, 917, 917, 917 917. From lliese values 1 coiicluded 

 I hal />,/ = 917. 



Afler thai llio values of /> (caleulaled) were delermiiied as follows. 

 Wc derive fr(un ecjualiou (1): 



b-b. 



1 



{f>-(>.r 



If we pul /> — h^^^izij, then we <iel for A,, — A„ = 454 



from wliieli follows; 



('— ^) - // 



^==454 



= 1 — 



454'^ 



(,_Z,j _ 2 y 



('—/'„) - // 



We know ihe \aliies of // already in ap|)ro\imali()]i fnuii // (found). 

 These \alues, suhsliluled inlo llie second iiiemlter of Ihe alxwe 

 e(pialioii. yi(dd Ihe accurate \alue of //. and so also of h. 



III. Let us hcLiin with a^siiminu' that the \aliie> of A„ and h,, 

 are iiidepeiideut of the temperatui-e. which follows from the supposition 

 of Prof. VAN i)Ki{ Waai.s, that the ipianlity <(, which depends on iIk^ 

 forces helween the atoms, is proportional to llie ahsolute leniperatiir(\ 

 Then w (' may calculal(> the crificdl (pianlilies in the follow inn' waA'. 

 E(piation (1) in connection with the follow iiiu' «Mpiation : 



where 



(V- = ur ri- — A/,. =^ - CI- (1 —A. — ,■?„). 





t'l 



1 



('•A—/'/.) 



1 



'r/-'A 



Tc'n- 

 ,ib 

 ,1 



'V/. 



39* 



