198  Miscellaneous  Implements  Exhibited  at  Park  Rotjal. 
which  communicates  with  it  by  the  passage  (a,).  The  air  for 
vaporising  the  oil  enters  through  the  inlet  (c),  and  passes  across 
the  tube  (n)  supplying  the  oil,  and  which  will  be  sprayed  on  to 
the  surface  (e,),  forming  the  roof  of  the  chamber  (a).  The 
resulting  vapour  ])asses  along  E to  F,  and  so  to  the  valve  (b). 
Simultaneously  with  the  drawing  in  of  the  charge  on  the 
outward  stroke  of  the  engine,  air  is  drawn  in  also  through  the 
main  air  valve.  On  the  return  stroke  the  charge  is  compi'essed 
into  the  chamber  (a)  and  the  extension  (h).  This  extension  is 
made  thin  (about  one-third  to  one-fourth  of  the  thickness  of 
the  main  body  of  (a))  becomes  highly  heated  by  the  successive 
exjdosions,  and  is  prevented  from  cooling  by  the  cover  (.t), 
which  has  an  asbestos  lining  (k).  At  or  about  the  extreme 
moment  of  comj)ression  the  heat  of  (h)  fires  the  charge  auto- 
matically, and  the  piston  begins  its  explosion  stroke.  The 
Fig.  10.— Sections  of  Vaporiser  for  Oil  Engine  (Articles  (178  and  879). 
degree  of  heat  desirable  in  the  extension  (h)  may  be  regulated 
by  drawing  back  more  or  less  the  cover  (.1),  which  a sjiring 
catch  (n)  keeps  in  any  desired  position  ; the  chamber  (a)  and  the 
vaporiser  (e)  are  ])rotected  by  a cover  (00),  and  this  cover  is 
closed  in  by  a sliding  lid  (p)  on  the  under  side.  When  .starting 
the  engine  this  lid  is  pulled  away,  and  a lamp  is  ])laced 
underneath,  the  cover  (.t)  is  drawn  back  so  as  to  expose  the 
extension  (h),  and  the  whole  is  heated  in  the  usual  manner. 
An  outlet  (o,)  is  made  in  the  cover  (00),  so  as  to  compel  the 
flames  of  the  lamp  to  envelop  the  chamber  (a)  and  the  vapor- 
ising pas.sages. 
Article  81(5. — Messrs.  Jesse  Ellis  c^*  Co.,  fAd.,  Invicta 
Works,  Maidstone.  “ Ellis-Balmforth  Patent  Vertical  Fire 
Tube  Boiler,  for  Steam  Motor  Waggons  ; heating  surface 
90  square  feet  ; grate  area  3^  square  feet  ; efficiency  8 lb.  of 
