sole exception of Honen Oil Mill, Dairen). 
Wedge system (producing round cake). 
Wedges are used for compressing Beans. 
Manual labour and little animal help used, putting 
on the plant a primitive complexion and making it neces- 
sarily small-scaled. In the interior of Manchuria, no small 
number of such plants still exist. 
Screw system (turning out round cake). 
The screw replaces the wedge in this system, whilst 
the oil-expressing is effected by manual labour, much of 
other parts of work being done by machine. In point of 
number. the mills in Manchuria mostly belong to this type. 
Hoh RATLIC SYSTEM : 
(Round cake produced). In place of the screw, 
hydraulic power is used. All large-scaled mills are operated 
by this system at Dairen and elsewhere. 
Bran PLATE SYSTEM : 
Among the oil expressing devices, the most advanced 
is the Bean Plate system. Compared with the hydraulic 
system, far greater pressure is required, and the residue 
assumes the form of bean plate, instead of round cake. 
As already mentioned, the Nisshin Oil Mills, Dairen, 
and the Kabalkin Mill, Harbin, are the only plants that 
are possessed of installations of this system. 
3.