Trials  of  Agricultural  ^Motors. 
191 
and  can  haul  a gross  load  (load  and  trailer)  of  about  3$  tons,  on 
average  country  roads,  and  that  the  larger  oil  tractor  can  haul 
loads  fully  up  to  the  maximum  requirements. 
Although  the  three  types  of  steam  tractors  and  two  types 
of  oil-engine  tractors  presented  for  trial  accomplished  the  tasks 
set  for  them  as  herein  described,  and  although  the  judges  con- 
sidered that  the  work  done  by  the  steam  engines  was  satisfactory 
as  far  as  merely  doing  the  test  work  is  concerned,  they  were 
unable  to  recognise  in  any  of  them  the  agricultural  motor  which 
is  hoped  for  as  the  ideal  general-purpose  tractor  and  engine  for 
farm  purposes. 
Though  unable  to  specify  the  ideal  agricultural  motor,  the 
judges  are  of  opinion  that  the  trials  will  prove  useful  as  providing 
the  experience  which,  if  fully  utilised,  may  lead  to  such  a motor ; 
one  which,  while  not  being  heavy,  will  be  capable  of  so  much 
of  the  tractor  work  as  may  enable  the  farmer  to  dispense  with 
the  hiring  of  the  traction  engine,  will  perform  enough  of  the  field 
work  and  will  be  capable  of  doing  any  of  the  work  for  which  an 
engine  is  required  on  a farm. 
In  concluding  this  Report,  we  wish  to  record  our  appreciation 
of  the  assistance  given  by  the  Steward  of  Implements,  Mr. 
C.  M.  S.  Pilkington,  and  by  the  Society’s  Consulting  Engineer, 
Mr.  F.  S.  Courtney ; we  desire  also  to  record  our  thanks  to  Mr. 
C.  Edward  E.  Cooke,  of  the  Manor  Farm,  Bygrave,  for  the 
admirable  arrangements  made  by  him  and  his  staff,  and  the 
assistance  they  gave  throughout  the  trials  at  the  homestead 
and  on  the  land,  assistance  which  more  than  usually  facilitated 
the  work  to  be  done. 
W.  Worby  Beaumont. 
Rt.  J.  Rayntun  Hippisley. 
NOTES  BY  THE  CONSULTING  ENGINEER  ON  THE 
TRIALS  OF  AGRICULTURAL  MOTORS. 
It  will  enable  the  reader  of  the  Report  on  these  trials  the 
better  to  appreciate  it,  if  the  conditions  under  which  they  were 
conducted,  and  how  the  figures  were  arrived  at,  are  set  out. 
In  order  to  ensure  a satisfactory  comparison  of  the  work  done 
by  the  several  Motors  to  be  made,  it  was  decided  to  use  pre- 
cisely similar  ploughs  in  all  the  trials.  For  which  purpose 
Messrs.  J.  and  F.  Howard  lent  four  of  their  well  known  three- 
