487 
into the central collecting cylinder, surrounded by warm water; 
(3) a fire grate surmounted by straight tubes communicating with 
the funnel. 
The cooler consists of a cylindrical tank containing the worm, 
one end of which communicates with the heat generator, the other 
end serving for the exit of the wine. 
The cold wine enters the machine by the tube (7), and, passing 
through a delivery controlling tap, reaches the bottom of the re- 
frigerator, fills the annulary space, forming a kind of worm parallel 
to the first worm. It then reaches the heat generator (calefactor) 
through the horizontal tube (13), then descends into the worm of 
the calefactor, rises through the collecting cylinder (9), intermixing 
thoroughly, and from there reaches the worm of the refrigerator 
through the tube (10), where it becomes cooled by contact with the 
cool wine surrounding the tube. 
Thermometers (6) and (11) record the temperature of the 
water jacket, and that of the wine coming out of the calefactor and 
out of the refrigerator. 
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Before starting, the steam generator is filled with water 
through the plug (2). When the level of the water reaches the 
overflow tap (3), the plug (2) is closed and the fire lighted. 
