( 28t ) 

 tiictor and bv -A' tbr all N spheres: 



A^3r 73 153 153 n 



jj2ii9 \ ^/2 n -] <n«-i 1/2 .(21) 



FH7.45.64 7.5.25G ^ 7.5.64 y \ \ f 



If for a moment we call the expression between brackets eo, this 

 may be written : 



/4 \3 iV3 9 w 



(— TiR-' ] -^X — —■ 

 \3 J V^ '^ 2 71 



For the double volume of tlic iV spheres of distance remains 

 also, after paying attention to the 1'^ and 2"'^ corrections: 



N . V, n R' - n. n my '1 'il + CV, , R'f . I f f : = 



L 64 V^ 2 n 1'3 J 



iV . V3 Ti li^ being equal to 8 h. If now 4 i =r h^ , then in 

 17 i^ .. CO fh 



r 17 bcc CO fl 



2/'oo 1 °^ +1S_(- 



the 2"'^ correction sought for evidently becomes equal to 18 — , so: 



n 



or 



this being our definite result. The value of this is, exact in 4 

 decimals, 



ft = 0,0958, 

 so almost 1/ q, whereas the P' correction was fully Vs- 



