OFFICIAL INSPECTIONS 7O. 75 



MANAGEMENT OF ACETIC FERMENTATION 



When the alcoholic fermentation is completed, it is well to 

 draw off the clear portion of liquid, rinse out the cask, replace 

 the clear liquid, add two or four quarts of good vinegar con- 

 taining more ore less "mother" and place at a tem.perature of 65 

 degrees to 75 degrees F. The acetic fermentation occupies from 

 3 to 18 months or more, according to the conditions under which 

 the fermentation is carried on. When the apple juice is stored 

 in cool cellars and left there until it becoimes vinegar of legal 

 standard, it requires from 21 to 24 months or even more, When 

 the alcoholic fermentation is allowed to take place in a cool 

 cellar and the casks then removed to a warmer place, the time 

 of vinegar formation ma}^ he reduced from that given above to 

 15 to 18 months. Where the alcoholic fermentation is hastened 

 by the use of yeast and the acetic fermentation favored by the 

 prqper temperature and addition of a vinegar "starter", it is 

 possible to produce good merchantable vinegar in casks in 6 to 12 

 months. In vinegar factories the formation of acetic acid is 

 greatly hastened by the use of "generators", in which the alco- 

 holic liquid is brought into intimate contact with a large supply 

 of air. In the hands of the ordinary farmer, making only a few 

 barrels of cider, these generators would probably not be found 

 entirely practicable. 



CARE OE CIDER VINEGAR 



When the acetic fermentation has gone far enough to produce 

 4.5 to 5 per cent acetic acid, then the barrels should be made as 

 full as possible and tightly corked, in order to prevent destructive 

 fermentation of acetic acid and consequent deterioration of 

 the vinegar. 



Vinegar Defined. 



The word vinegar used alone always means pure apple cider 

 vinegar without any additions and containing at least 4 per cent 

 acetic acid. 



The words Cider Vinegar by themselves always refer to pure 

 apple cider vinegar as defined above. 



