Fig.  2. — Hensman. 
211)833*7(41*6  lbs. 
the  Average  Power. 
Diagrams  of  Threshing-machines. 
Fig.  3. — Mackei.can.  Fig.  4. — Clayton  & Co. 
31)1594*6(51*4  lbs. 
tlie  Average  Power. 
33)19fe3’3(30‘l  lbs. 
the  Average  Power 
