Courtesy of Abbott Laboratories. 



(b) 



Courtesy of Myron P. Backus, 

 (a) 



<_'ouil('s\ ot Alibott Laboratuiics. 



"(c) 



Fig. 14-3. Production of penicillin, (a) Colony of the high-yielding 

 penicillin mold, Penicillium chrysogenum, Wis. Q176. This culture was 

 used industrially for many years to produce penicillin, (b) Fermentation 

 tanks of 6000 gal. capacity used in the submerged production of penicillin, 

 (c) Crystals of the sodium salt of penicillin. 



373 



