270 J. SAKUKAI; 



the dissociation of these molecules into H, on the one hand, and 

 H 2 N - B"-C 0-0 or H 2 N - li"- S0 2 - Ü, on the other, occurring to a much 



less extent than in the case of non-amidated acids, which dissociate 

 into H and R'C0 2 or R'S0 3 . It may be observed that the introduc- 

 tion of a group into organic amido-acids that diminishes their salt-like 

 character must facilitate their dissociation, and thus increase their 

 conductivity and strength. The superior conductivity of aceturic and 

 hippuric acids compared with glycocoll may be cited in favour of this 

 view. 



The law of dilution. As is well known, Ostward's dilution- 

 formula — 



k = 



m 



('-■£■> ' 



which expresses the relation between conductivity, /•«,., and dilution, v, 

 of electrolytes which are only moderately dissociated, does not apply 

 in the case of highly dissociated electrolytes. Now, Rudolphi has 

 shown (Zeit, physik Glum., 17, 385 [1895]) that the following 

 empirical formula well expresses this relation : 



(# 



and, further, van't Hoff (Zeit, physik. Chan., 18, 300 [189G]) has 

 pointed out that the relation may be equally well expressed by altering 

 Rudolphi's formula into 



, (t) f (£)' (£4)' 

 >£>v;r>£> "{(!-££ 



