631 
Report  on  Implements  at  York. 
the  ordinary  pattern  of  folding  elevators,  is  a simple  and 
efficient  self-acting  tightening  rod  to  lengthen  the  carrying 
chains  for  work,  by  an  ad  justable  screw.  The  axle  of  the  chain- 
drum  works  in  a slot,  and  is  capable  of  moving  10  or  12  inches. 
The  lower  end  of  the  rod  comes  against  a stop  on  the  lower  half  of 
the  frame  ; the  upper  end  is  in  contact  with  the  adjustable  screw 
which  actuates  the  axle  of  the  chain-drum.  As  the  front 
portion  of  the  elevator  is  unfolded  into  position,  the  rod  acting 
on  the  screw  pushes  the  chain-drum  into  a position  to  insure  a 
proper  condition  of  tension  to  the  travelling  chain.  The 
elevator  costs  45/.  and  the  horse  gear  71.  10s. 
Mr.  Henry  Denton,  of  St.  Peter’s  Iron  Works,  Wolverhampton, 
exhibited  a Two-Horse  Gear  with  Intermediate  Motion,  which 
may  be  noticed  as  an  adaptation  of  the  capstan  principle  to  a 
‘ horse  gear.  The  bell-cover  is  cast  in  one  piece  with  the  teeth, 
but  the  latter  are  so  arranged  that  broken  teeth  can  be  replaced. 
The  upright  shaft  is  stationary,  having  a steel  boss  on  the  top 
welded  on.  A set  pin  revolves  on  the  boss.  The  motion  is 
easy,  no  friction  wheels  being  required. 
The  frame  of  the  intermediate  gear  is  bolted  together  and 
bored  as  a whole,  doing  away  with  glands,  which  cannot  be 
tampered  with  by  the  attendant.  Of  course  by  this  arrangement 
it  is  impossible  to  adjust  the  brasses  ; as  they  wear  away 
they  must  be  removed  and  reground.  The  advantage  of  this 
arrangement  is  therefore  somewhat  doubtful.  Price  complete, 
14/.  15s. 
A Steam  Digger,  by  Cobham  and  Co.,  of  Stevenage,  was 
ordered  out  for  trial,  but,  unfortunately,  a breakage  affecting  the 
motion  of  the  diggers  prevented  the  machine  being  seen  in 
work,  although  the  travelling  powers  were  not  impaired.  This 
was  the  more  to  be  regretted,  as  there  were  good  points  about  the 
machine — notably,  compactness  of  form  ; reduction  of  weight ; 
distribution  of  that  weight  by  means  of  broad  travelling-wheels  ; 
independent  carriage  of  the  digger  proper  on  small  wheels  of 
its  own,  allowing  of  equally  good  work  across  ridge  and 
furrow,  or  upon  a level  surface  ; easy  detachment  of  digging- 
frame,  when  the  engine  is  available  for  ordinary  farm  work, 
travelling,  threshing,  &c.  All  these  were  meritorious  features 
of  this  machine,  which  rendered  it  very  desirable  to  have 
carried  out  careful  tests.  Mr.  Cobham  did  all  in  his  power 
to  have  his  machine  in  working  order  on  Thursday  morning, 
but,  notwithstanding  indefatigable  exertions,  the  arrangements 
could  not  be  carried  out,  which  was  a great  loss  for  himself 
and  the  public.  One  man  can  work  the  machine,  with  the 
help  of  the  water-cart  lad  in  starting  the  engine.  As  the  digger- 
frame  is  independent  of  the  engine,  and  carried  on  its  own 
