348 



MICRO-ORGANISMS AND FERMENTATION. 



When this species is cultivated in wort near the maximum 

 temperature for growth its vegetation consists of round and 

 oval cells. The temperature limits for budding in wort are 

 40 and 0-5 C. 



It frequently occurred in Hansen's analyses of air in the 

 brewery ; it appears to belong to the species which do not 

 cause diseases in beer. Saccharose, dextrose, laevulose, and 

 maltose are fermented, but not lactose. 



Fig. 7LSaccharomyces Pastorianus II. (Hansen). Film-forms at 15 to 3 C. (after Holm's 

 drawing in Hansen's Memoir). 



Ascospore formation (Fig. 58, 3) : 



At 29 C. no ascospores are developed. 



27-28 the first indications are seen after 34 hours. 

 25 ,, ,, 25 ,, 



23 27 



17 ,. ,, 36 ,, 



15 48 



H-5 77 



7 ,,7 days. 



3-4 17 



0-5 no ascospores are developed. 



Size of the spores 2 to 5 /K. 



