428 



Prof. Baly and Mr. Tryhorn on Light 



From this formula the absorptive power of pyridine at 

 various concentrations in the five different solvents has been 

 calculated, and the curves showing the relation between k 

 and V are given in fig. 2. For convenience in plotting the 



Fig. 2. 















































































































































































































































/ 



A 

















































/. 

















































/ 

















































/ 



/ 



















































/ 



















































/ 





















































/ 



















































/ 





































IV 











































f 



/ 





























4-0 















/ 



/ 















































'/ 













m 























^3 



i 











t/' 













n 



1 





' 













i ! 

 1 









/ 



<M 



V 















1 ! 































//y/ 















i 









I I 



















| W 





















i 





i 



















7 























! 



















// 



























1 





















1 













































t 



f 















































b 



































i 















/ 



f 





































2-3 



i 



J 







i i 

































! , 



r 























1 i 















2-6 

 2-5 





/Mil 











































Kin 









































'1 







































10041 

 7600 



1-0 1-2 1-4- l-G 1-6 00 0-2 0-4 



6 0-8 1-0 1-2 1-4 1-6 1-3 2-0 22 24 2-6 2-8 3-0 32 3-4 3-6 3-8 

 Los V. 



Absorptive power of pyridine. 



Curve I in water. 

 , II in alcohol. 

 „ III in N/5000 HC1. 



Curve IV in N/1 HC1. 



„ V in concentrated H 2 S0 4 . 



logarithms of k have been placed on the ordinates and the 

 logarithms of V on the abscissae. The crosses on the curves 

 are the values experimentally found and shown in Table TV. 

 As may be seen, these experimental values lie on the appro- 

 priate curve in every instance. The values of a were calcu- 

 lated from the absorptive power of pure pyridine and the 



