and for the ReBificathn of Spirit of Jl-'lne. 229 



from the middle of each of which a tube projedls ; the one, 0, 

 in the upper cover, is deftined for receiving the beak of the 

 flill. From the under one the condenfed vapour flows into 

 the lower veflel. The copper box p pafles through the 

 oblique-lying caflc or veflel q, and proje6ls fome inches be- 

 yond both its ends, in order to receive the covers. The box 

 may be cleaned without any difficulty: the expcnfe of it wilt 

 not be one-half that of a. worm, and yet it will anfvver the 

 purpofe of the latter completely. 



When you proceed to diftiilation, the veflel may be filled 

 half a foot above the upper tube h, and at the fame time 

 that tube may be conneiSled with the tube i, by flipping their 

 ends into each other. The fire made in the furnace will then 

 exercife an equal action on all fides : the heat proceeds through 

 the tube g into the upper draught tube A; both tubes, as 

 well as the furnace, are completely furrounded by the fluid; 

 and the advantage of tliis apparatus in regard to the faving 

 of fuel may be readily conceived, as that in the furnace can 

 have no aftion but on the fluid, and as the heat which pafles 

 through the tubes is applied to the fame purpofe. If we cal- 

 culate, on the other hand, how much fuel is necefl^ary be- 

 fore the thick brickwork of common fi:i!ls can be fufficiently 

 heated, and how much heat is lo(l without being able to 

 exercife any aftion on the ftill itfelf, the advantage of this 

 apparatus will be placed beyond all doubt. 



If fo much of the diftilled liquor has pafl!ed over as to con- 

 vince one that the tube h can no longer be completely fur- 

 rounded with the liquid, but that it muft lie above ^tj in that 

 cafe it will be neceffary, in- order that the afcendino- vapour 

 may not be dilated too much by fuperfluous heat, to remove 

 the connecting tube i, by which means the communication 

 between the upper tube and the furnace is intercepted. 



One defect, which this apparatus has in common with 

 the ufual ftill, is, that the grains and flimy parts burn very 

 eafily in the diftiilation of fpirits from corn; yet one might 

 think that this fault would not take place in this apparatus 

 to the fame extent as in the conimon way of applyinp- the 

 lire. The grains, on account of their gravity, fink to tliC bot- 

 tom, on which, in the common ftill, the fire can cxcrcile the 



ftroii_reft 



