22 



2000 p- 



1900 



1800 



1700 



1600 



1500 



1400 



1300 



1200 



» 1100 



o 



a 



^ 1000 



t 



] 900 

 800 



Otto Warburg: 



-Wässeriger Extract 



Granula 



500 



400 '— 



300 



200 



riiililillniili 



1 



ä. 



J-iJ 



I M.>i'- i' ^—iiiil I ml II II ^11 iiililiilllill^Bil iilii il'iii 

 Methyl- Atliyl- Propyl- Butyl- Amyl 



Urethan. 



Fig. 1. 



