BREAD RAISING; FERMENTED LIQUORS 97 



price. These flavoring extracts are mixed at home with 

 a quantity of sugar and water (two pounds sugar to ten 

 quarts water). To the mixture is added a considerable 

 amount of yeast (one cake for the above quantity), and the 

 whole material, closed in bottles or other vessels, is then 

 set aside in a 

 warm place for 

 fermentation. 

 The fermenta- 

 tion goes on 

 rapidly, and in 

 the course of a 

 couple of days 

 a beverage is 

 produced, filled 

 with carbon di- 

 oxide, which 

 causes a bub- 

 bling and froth- 

 ing when the 

 vessel is opened, 



and containing Fic 45. Miscellaneous species of yeast. 



a small quantity n, S. cerevlsiie; t, S. pastorianus /, from wine ; c, .S". pastoriti- 

 c -I 11 #-T-'i nus III : d, S. ellipsoideus II; e, S. cercvisi<e, from beer; 



of alcohol . 1 he ^ ^ apiculatus; ^. S. minor. 



amount of alco- 

 hol in such beverages is small if the fermentation is not 

 kept up too long ; but in old homemade beer the alcohol 

 may be considerable. 



Such home-brewed beer has come to be somewhat 

 extensively used in recent years. In its manufacture it 

 must be remembered that the fermentation, which results 



