Tyrocidine hydrochloride. From 

 Hotchkiss (435) 



.-•^\ 





.*^\ #.->, v^^ 



Fumigacin. From Waksman and 

 Geiger (933) 









Gramicidin. From Hotchkiss 

 (435) 



^ 



\ 



Gliotoxin. From Waksman and 

 Geiger (933) 



Citrinin. Prepared bv Timonin 



Actinomycin. Prepared by Tischler 



Figure 18. Crystalh'ne preparations of antibiotic substances. 



