212  Miscellaneous  Implements  Exhibited  at  Gloucester,  1909. 
Calorific  Value. 
Calories 
British  Thermal  Units 
Evaporative  Power 
. 19-69  lbs. 
10500. 
18900. 
Yours  faithfully, 
{Signed')  R.  H.  Harey  Stanger. 
F.  S.  Courtney,  Esq.,  M.Inst.C.E.,  &c., 
25,  Victoria  Street,  S.W. 
No.  3758. — The  80-B.S.P.  Crude  Oil  Marine  Engine, 
price  525Z,  exhibited  in  motion  at  the  same  stand,  though  it 
can  hardly  be  deemed  an  Agricultural  Implement,  deserves 
mention  on  account  of  the  ease  of  handling,  the  reversing 
especially  being  as  quick  and  certain  as  a steam  engine. 
No.  3883. — A ‘HO-H.P.  Agricultural  Motor  Tractor,  fitted 
as  a mowing  machine,  the  cutter  bar  being  driven  direct  by 
an  eccentric  on  the  main  shaft. — Exhibited  by  the  Cyclone 
Agricultural  Tractor  Company,  Ltd.  This  cutter  bar  may  be 
removed  and  the  tractor  then  used  for  drawing  a 2-furrow 
plough  or  an  11-tine  cultivator.  It  will  drive  a 4 ft.  6 in. 
threshing  machine,  &c.  The  engine  is  water  cooled. 
No.  3884. — Light  Self-propelling  Motor  of  ^ or  1 H.P. — 
Exhibited  by  H.  P.  Saundersou  & Co.,  Ltd.,  Elstow  Works, 
Bedford.  This  may  be  used  either  with  a removable  body 
capable  of  carrying  a load  of  half  or  one  ton  respectively  or 
with  body  removed,  for  any  agricultural  purpose.  The  engine 
is  air  cooled,  a current  of  air  being  driven  on  to  the  gilled 
cylinder  hy  a small  fan.  It  is  stated  that  this  arrangement  is 
found  perfectly  satisfactory  in  practice. 
It  may  be  remarked  that  if  air  cooling  be  found  sufficient 
it  will  be  an  advantage  in  every  way,  lightness,  economy  in 
first  cost,  simplicity,  and  freedom  from  breakdown  due  to  the 
freezing  of  the  cooling  water  resulting  in  cracked  pipes  or 
cylinder.  Very  little  has  been  done  with  air  cooling  in  England, 
but  in  the  United  States  where  the  weather  conditions  are 
much  more  severe,  greater  precautions  have  to  be  taken  to 
prevent  freezing,  and  air  cooling  is  largely  used  ; engines  of 
45-50  H.P.  have  been  thus  made  and  are  stated  to  work  well. 
The  R.A.S.E.  trials  of  Motor  Tractors  which  will  take  place  at 
Liverpool  next  year  will  doubtless  throw  a great  deal  of  light 
on  this  and  other  questions. 
No.  4055.  — 8-H.P.  Petrol  Engine,  '■'•Little  Eagle." — 
Exhibited  by  the  Eagle  Engineering  Company,  Warwick.  This 
is  a small  vertical  stationary  engine  fitted  with  low  tension 
magneto  ignition.  The  cylinder  jacket  has  a thin  lead  plate 
about  2 in.  by  1 in.  fitted  into  it  which  is  supposed  to  give  way 
in  the  event  of  the  water  freezing  in  the  jacket. 
