602 
Report  on  Implements  at  York. 
2551.  Screen  for  Corn,  Seeds,  &c.  .. 
5962.  Small  Dredger  
4762.  Straw  Yealming  Machine  .. 
844.  Horse  Hoe  
2075.  “ Albany  ” Butter- worker  .. 
3879.  Hope  for  Steam  Cultivation 
Shield  & Crockett,  Nottingham. 
Priestman  Bros.,  Hull. 
R.  Maynard,  Whittlesford 
Works,  near  Cambridge. 
Fred.  Savage,  King’s  Lynn, 
Norfolk. 
T.  Bradford  & Co.,  Manchester. 
Geo.  Cradock  & Co.,  Wakefield. 
FoderHs  Threshing  Machine. — The  novelty  in  this  machine 
consists  in  the  employment  of  an  exhaust  fan  so  arranged  as  to 
carry  out  the  work  usually  performed  by  the  first  and  second 
winnowers,  and  which  also  acts  as  a chaff-lifter  and  chaff-cleaner. 
The  advantage  is,  in  the  first  construction,  in  the  saving  of 
power  for  a given  result — inasmuch  as  both  blast-fans,  as  well  as 
shafts,  pulleys,  and  straps,  are  dispensed  with, — and  in  the  excel- 
lence of  the  work  due  to  the  arrangements  for  regulating  and  con- 
trolling the  current  of  air  according  to  the  nature  of  the  grain  to 
be  dealt  with.  Minor  merit  is  found  in  the  construction  of  the 
scourer  or  hummeller-chamber,  which  has  a ribbed  lining  sepa- 
rate from  the  casing,  and  is  cast  in  two  parts  of  half-cylindrical 
form,  capable  of  being  reversed  in  position,  so  that  when  the 
ribs  get  worn  out  on  one  side,  the  lining  can  be  removed  and 
reversed,  and  so  present  the  other  edge  of  the  ribs  to  the 
scourer.  In  connection  with  this  portion  of  the  machine  must 
be  mentioned  a valve  on  the  under-side  of  the  tunnel  or  creeper 
by  which  the  grain  travels  to  reach  the  scourer,  by  means  of 
which  corn  can,  if  required,  be  withdrawn  without  passing  into 
the  scourer.  This  is  an  advantage  where  the  sample  contains 
smut  and  damp  grain,  which  would,  if  worked  through  the 
scourer  in  the  former  case,  impregnate  the  sample  through  the 
breaking  of  the  smut  balls,  and  in  the  latter  cause  the  choking 
of  the  cleaner.  By  means  of  the  drawings  used  by  Mr.  Foden 
in  his  specification  I shall  hope  to  make  the  character  of  this 
valuable  and  ingenious  invention  clear  and  understandable. 
The  blocks  for  Figs.  4 and  5 have  been  kindly  lent  by  the 
editor  of  the  ‘Engineer,’  in  whose  issue  of  July  20  a descrip- 
tion of  Mr.  Foden’s  invention  appeared. 
The  easiest  mode  of  explanation  -will  he  to  follow  the  passage  of  the  air, 
which  is  drawn  into  the  machine  by  the  inlets  a a,  Fig.  5,  at  the  base  of 
the  exhaust  box  b,  and  close  to  the  mouth  of  the  revolving  screen  d.  The 
air,  as  it  rushes  up  on  its  way  to  the  exhaust  fan  on  the  opposite  side  of 
the  machine,  meets  with  the  grain,  light  corn,  and  such  particles  of  chaff, 
as  have  escaped  the  first  action  of  the  wind,  as  com  and  chaff  fell  from  the 
drum  into  the  dressing-chest  t,  or  have  been  separated  from  the  grain  by 
the  scourer  p.  The  descending  corn,  &c.,  is  weighed  by  the  ascending  wind; 
and  the  light  grain  and  other  light  particles  are  carried  along  with  the  cur- 
rent in  the  direction  of  the  arrows  through  the  passage  c (which  is  arranged 
in  this  case  inside  the  framing  c1  of  the  machine)  into  the  light  corn 
pockets  d,  when  the  pressure  is  reduced  owing  to  the  increased  area,  the 
