454 



The lens is outwardly covered with cloth (such as packing 

 cloth), which is kept constantly wet during the entire operation by 

 the dripping of water which comes from refrigerator through the 

 cock 10' and into the collar 4'. 



The result is that the outer vaporisation going on takes away a 

 certain quantity of the heat in the interior at the expense of the 

 aqueous vapours therein which become disengaged from the alcoholic 

 vapours. The aqueous vapours become condensed, and fall back 

 into the copper, taking along with thena all the empyreumatic oils, 

 whilst the lighter and more purified alcoholic vapours pass into the 

 worm, where they become condensed into liquid and received at the 

 outlet 13. 



A higher or lower degree can be obtained by more or less damp- 

 ing the cloth. The lens can be withdrawn, if desirable, when 

 distilling rich alcoholic juices or matter ; in this case it is replaced 

 by the junction pipe 17, which is of the same height, and fits into 

 the head and the conduct pipe. 



Tilting Still. 



1. copper ; 2, overflow of the hydraulic gutter ; 3, head ; 4, collar ; 5, screw stopper ; 6, 

 conduct pipe ; 7, worm ; 8, refrigerator ; 9, funnel ; 10, degree regulating cock ; 11, over- 

 flow ; 12, clearing tap ; 13, testing pipe at the outlet of worm ; 14, furnace in sheet 

 iron ; 15, stand for the refrigerator ; 16, draw-off cock ; 17, trunnion ; 18, tilting lever. 



In this still the copper swings on two trunnions, and cannot 

 dismount. Apart from these stills, which have a boiler capacity of 

 25 to 250 gallons, the same makers turn out brandy stills with wine 

 heaters, continuous stills and rectifying apparatus of novel design 

 and great merit. 



In the Cognac district of France, where these and other similar 

 stills are greatly used, the wine is distilled as soon as fermentation 



