603 
Beport  on  Implements  at  York. 
consequence  of  which  is  that  the  light  corn,  short  straws,  &c.,  instead  of 
being  carried  forward  with  the  air,  are  liberated,  drop  down,  and  reach  the  light 
spout  l (Fig.  5),  and  are  so  separated  without  going  into  the  circular  screen 
at  all.  It  should  here  be  noticed  that  the  exhaust  box  b is  enlarged  con- 
siderably at  the  part  b1.  The  object  of  this  is,  that  any  portion  of  heavy 
corn  which  may  have  been  carried  up  with  the  lighter  portions  by  the 
2 r 2 
