344 



SORGHUM. 



Plate XXXV. 



The above plates, No. XXXV, show two forms of defecators made by the Cohvell 

 Iron Works, Xcw York, made either with cast-iron, wrought iron, or copper, with double 

 bottoms, as shown in one plate, or with copper coils, as shown in the other plate. 



These vessels can be used as clanfiers, if needed; but it is objectionable to have a ves- 

 sel of too great a depth. Therefore, the vessels represented in Plate XXXVI are recom- 

 mended, either being as large as occasion requires, and so arranged with a scum trough 

 round the top, that, in the rapid ebullition, the overflowing liquor and scum can be 

 caught, and, by an automatic arrangement of valve, the liquor can be returned to the 



