188  Miscellaneous  Implements  IJxhihited  at  Park  lioi/al. 
in  last  year’s  Journal,  Vol.  04,  pp.  229-231.  It  lias  now 
been  so  far  perfected,  and  lias  during  the  last  twelve  niontlis 
so  proved  its  utility  in  agriculture,  that  the  J udges  awarded  it 
a Silver  Medal. 
The  genei’al  design  and  appearance  remain  the  same,  but 
among  the  principal  improvements  are  : — two  speeds,  arrange- 
ments for  cooling  the  cii'culating  water,  automatic  lubrication, 
and  general  improvement  in  engine  detail.  A simple  arrange- 
ment for,  and  its  capability  of,  drawing  two  reapers  and  binders 
at  the  same  time  was  demonstrated  in  the  Showyard. 
Article  490. — Messrs.  H.  J.  West  4’  Co.,  Ltd.,  118,  South- 
wark Bridge  Road,  London,  S.E.  “ Patent  safety  carbonic 
anhydride  process  Refrigerating  Machine,  with  combined 
accumulative  pure  ice-making  tank  and  cold  stoi'age  chamber.” 
Price  150h — This,  undoubtedly  one  of  the  most  attractive 
exhibits  in  the  Showyard,  is  of  par- 
ticular interest  to  owners  of  large 
country  houses  where  ice  is  not  easily 
procurable  ; also  to  hotels,  hospitals, 
and  other  institutions,  and  to  butchers, 
fishmongers,  dairymen  and  others,  by 
all  of  whom  the  great  advantages  of 
cold  storage  must  have  been  long 
appreciated  (Fig.  4). 
A cold  storage  and  ice-making  plant 
for  domestic  purposes  must  be  adapted 
for  management  by  unskilled  persons, 
and  it  is  in  the  details  which  make  the 
machine  so  simple  and  proof  against 
carelessness  that  Messrs.  West  <fe  Co. 
seem  to  have  been  especially  successful. 
Foremost  amono-  these  details  is  their 
O 
safety  valve  arrangement,  which  is 
Fig. 4— Refrigerating  Machine  absolutely  positive.  Its  object  is  to 
prevent  the  breakage  of  the  crank  shaft, 
})iston  rod,  or  cylinder,  as  the  result  of  the  attendant  forgetting 
to  open  the  stop  valve  when  starting  the  compression.  Such  an 
accident  in  the  case  of  an  ammonia  machine  would  be  fraught 
with  great  danger  to  human  life  ; and  though  there  is  little 
danger  in  the  case  of  a carbonic  acid  (CO2)  machine,  this 
new  iind  simple  safety  valve  is  a great  improvement.  The 
princi[)le  is  a screw-down  valve  having  two  seats  facing  one 
another,  om*  in  communication  with  the  air,  the  other  with  the 
