479 
at  the  Exeter  Meeting,  1850. 
combining  the  trial  of  the  horse-works  with  the  barn  part,  the 
necessity  of  which  was  forcibly  pointed  out  by  Mr.  Thompson  in 
his  report  of  last  year. 
Fig.  1. 
Testing  Apparatus  for  Threshing-Machines. 
The  following  explanation  of  the  diagrams  is  furnished  by 
Mr.  Amos : — 
To  enable  the  public  generally,  and  the  implement-makers  in  particular, 
to  form  an  opinion  of  the  testing-machine  used  at  this  meeting,  I beg  to 
submit  the  following  sketch  of  its  leading  features,  which  I trust  will  be 
intelligible : — 
See  lig.  1.  A is  a Ranch,  provided  with  pins  to  take  hold  of  short  arms 
x,  x , x,  x,  placed  in  the  Ranch  of  the  horse-works  where  the  horse-draughts 
are  usually  fixed.  The  Ranch  A is  keyed  upon  the  shaft  B,  and  upon 
this  shal't  is  keyed  the  wheel  C.  This  wheel  is  5 ft.  11 5g  in.  diameter,  and 
has  120  cogs,  on  its  periphery.  Into  this  wheel  the  pinion  D works, 
2 i 2 
