658 



Professor T, E. Thorpe 



[March i, 



Fundamental Viscosity Constants — continued. 



Sulphur C— S— C 



Chlorine (in monochlori(les) 



Chlorine (in dichlorides) 



Bromine (in raonobromides) 



Bromine (in dibromides) 



Iodine 



Iso grouping 



Double linkage 



Ring-grouping 



The following tables show the numbers calculated by means of 

 these constants, together with those actually observed in a number of 

 cases : — 



