396 MOULDS AND YEASTS 



A form named by Harrison, Torula amara, was found 

 to be the cause of a bitter taste in milk and cheese, and 

 Rogers mentions a variety which gave an objectionable 

 flavour to butter which was packed in wooden casks. 



Ex. 182. Isolate and study the various kinds of Torula 

 occurring 



(a) On the rind of Stilton or soft cheeses ; 

 () In soil; 



(c) In farmyard manure. 



Grow them on gelatine and agar media, in plain and sugar- 

 bouillon, and in milk. 



Note the form and colour of their colonies, their liquefying 

 action on gelatine, their power of coagulating or rendering milk 

 acid or alkaline, and their action on bouillon containing sugar. 

 Differentiate them from Saccharomyces. 

 Try growth on gypsum blocks. 



Bacteriological apparatus of all kinds can be obtained from Messrs Baird 

 & Tatlock, Cross Street, Hatton Garden, London, E.G. 



