597 



Now we calculate the miiTiber of places at the disposal of a 

 definite set of three, goinf> only until the required order of magnitude : 

 molecule J : x ))la('es 



molecule 2 : 



dv. 



molecule 3: at the disposal of this molecule is the Sjiace described 



by the hatched pai-allelogram in revolving 

 about the hue 1, 2. 



Contents 



sin Y 



Ink,. 



The number of places in question is 



V V 



X. 2üt ~ — d)\di\ 

 tlierefore ; ,wiiere the relation 



has been used. 

 The nu molecules thus give the factor: 



«ici23-' /^S.-t" r^r^r^ dr^dr^dr^\ ^ 





rfr 



(8) 



where the sign of multiplication has to be extended over all possible 

 combinations r,. i\, i\. 



The number of jnicro-complexions in the group macro-complexion, 

 \V, is now obtained by multiplication of (3) by the product of the 

 factors (5), (7), and (8), taken for each of the volume elements 

 (li\, dv„ etc. 



From this we derive 



In W 



71 nn In Mil,, 



— 2.- ^ n'la — 



,/„ dv . 



«iiM In n\\b\ • 

 b 



n\irvj^ \nn I I, .123 



di> dv. j„ dv 



do dv.^ dv dr 



n\i\ n\i,\ 



— in n,„ - ^ + 



nu,\ , 4,'rrjVri nii\ nui , _ , , v 

 ^ 2 dv, 2 dv, '^ '' ^ 



4- i 2: I «|rl23 In >'|rl23 — I "Icl23 + 



dv diydriidri\_ 



wici23 , 247t' r^r^r^ dr,dr,dr^ 



+ -1— in —-. 



3 «?'',- 



+ 



(9) 



39* 



