46 W. E. lord — Chemical, Optical and other Physical 



Fig. 11. 



510 

 500 



WO 

 170 



mo 



ffO 

 430 

 420 

 WO 

 400 



Tie lotion between flol Wt. and ' 5p.& 



"5 



f3 



T 



<3i 



>* 



Fig. 12. 



.w 



230 



.no 



210 

 ZOO- 

 ■190 



■ISO 



■no 



■/60, 



Relation between Mol. Wt and fa 



