ALCOHOLIC FERMENTS. 



163 



sausage-shaped cells, but also large and small round and oval 

 cells (Fig. 37). 



It frequently occurs in the air of the fermenting-rooms. 

 It imparts to the beer a disagreeable bitter taste and 

 unpleasant odour ; it can also produce turbidity, and can 

 interfere with the clarification of the beer in the fermenting 

 vessel. 



FIG. 37. 



Saccharomyces Pastorianus I. Hansen. Cell-forms of young sedimentary 

 yeast, after Hansen. 



Ascospore formation (Fig. 32, 2) : 

 At 31-5 C. no ascospores are developed. 



29.5 30-5 the first indications are seen after 30 hours 



27 

 24 

 26 

 35 



29 



27-5 



23.5 



18 



15 



10 



8-5 



7 



3-4 



0-5 no ascospores are developed. 

 Size of spores 1*5 5 p. 



50 



89 



5? 



5 days 



7 

 14 



