Report  on  Implements  at  York.  029' 
all  the  weight  of  the  load  to  agitate.  The  action  is  easy  and 
rapid.  Three  or  four  movements  of  the  large  screen  ensure 
the  separation  of  seed  and  small,  which,  falling  through  the 
meshes  of  the  sieve,  are  conveyed  by  an  inclined  plane  to  the 
second  sieve.  The  best  potatoes  are  delivered  into  a sack  by 
ilting  the  screen,  and  a fresh  supply  is  received.  The  process 
is  rapid  and  effectual.  The  second  sieve,  after  being  duly 
agitated,  which  allows  of  the  small  sets  passing  through  to  a 
basket,  is  tilted  up,  and  its  proceeds  delivered  into  a second 
sack.  The  frame,  of  strong  construction,  is  carried  on  two 
Fig.  28. — View  of  Lightfoot’s  Improved  Potato  Riddler. 
small  iron  wheels  and  axle  in  front,  and  raised  by  handles 
behind,  and  so  moved  like  a common  two-wheeled  barrow. 
The  price  is  hi.  The  riddles  being  loose  in  riddle-boxes,  any 
sized  riddle  can  be  used.  Thus  for  Regents,  lf-in.  to  lj-in.  are 
suitable;  for  Champions,  2-in.  and  1|  in.  Kidney  potatoes 
may  be  worked  by  altering  the  size  of  mesh.  If  potatoes  are  free 
Irom  disease,  the  patentee  states  that  30  cwt.  per  hour  can  be 
screened  ; if  moderately  free,  about  25  cwt. 
Mr.  James  Coultas,  of  Grantham,  exhibited  a patent  apparatus 
by  means  of  which  the  chimneys  of  Portable  Engines  can  be 
raised  or  lowered  with  great  ease.  To  show  the  utility  of  this 
novelty  it  is  only  necessary  to  remind  our  readers  that  hitherto, 
when  this  operation  has  to  be  performed,  the  attendant  must  get 
in  the  top  of  the  engine.  The  chimney  is  often  very  hot,  and  it 
is  not  an  easy  job  either  to  raise  or  lower.  It  is  farther  possible 
that  an  accident  might  occur  during  the  operation,  and  there  is 
