90 



VINEGAR, CIDER, AND FRUIT-WINES. 



the fluid must be made in the apparatus itself, or for its being 

 conducted to a special reservoir at the rate at which it trickles 

 from the shavings. In the first case the. space beneath the lath- 

 bottom must be of sufficient size to receive the fluid passed through 



the apparatus in a certain time. This 

 Fi. 28. time being suitably fixed for 12 hours 



the apparatus can during this time 

 work without further assistance, so 

 that the required space beneath the 

 lath-bottom can be calculated by mul- 

 tiplying the number of affusions with 

 the quantity of fluid poured in at one 

 time. 



Example : The generator receives 

 at intervals of 30 minutes an affusion 

 of 5 quarts, hence in 12 hours 24 affu- 

 sions of 5 quarts each = 120 quarts. 

 The space beneath the lath-bottom 

 must, therefore, be of sufficient capa- 

 city to receive up to the height of the 

 Bell-siphon. draught-holes at least 120 quarts of 



fluid. 



As will be seen from the following general description of a 

 vinegar factory arranged according to the automatic principle, it 

 is decidedly preferable to arrange the generators so that the fluid 

 trickling from the shavings is at once conducted to a collecting 

 vessel. 



Arrangement of a Vinegar Factory working according to the 

 Automatic Principle. 



As previously stated, it is not possible to convert all the alcohol 

 contained in the liquid into acetic acid by one affusion ; only a 

 portion of the alcohol is converted and this semi-product is brought 

 into a second generator, and, if the liquid used is very rich in al- 

 cohol, into a third. In the second apparatus another portion of 

 the alcohol is converted into acetic acid and the process finished 

 in the third. 



