A.m.  Jour.  Pharrn. 
Dec,  1893. 
Effect  of  Noxious  Gases. 
569 
an  atmosphere  of  -2  of  1  per  cent,  of  H2S,  and  99-8  per  cent,  of  air, 
simultaneously  with  No.  1,  using  two  Shaw  Gas  Testers,  as  mixers 
for  the  operation,  both  connected  with  the  same  bag  of  H2S.  Death 
resulted  simultaneously  in  cylinders  Nos.  1  and  2  at  the  end  of  10 
minutes. 
Result. — -2  of  1  per  cent.  H2S,  and  99  8  per  cent,  air,  10 
minutes  inhalation ;  death. 
No.  4.  I  placed  a  rabbit  in  a  glass  cylinder  and  pumped  in  an 
atmosphere  of  one-tenth  of  1  per  cent,  of  H2S,  or  the  T^Vo  Part  an<^ 
99  9  per  cent,  of  air.    Death  resulted  in  37  minutes. 
Result. — 1  of  1  per  cent.  H2S  or  the  part,  and  999  per 
cent,  of  air,  37  minutes  inhalation ;  death. 
Note. — In  all  of  the  above  tests  rabbits  were  seized  with  convul- 
sions 10  to  15  seconds  after  immersion  in  poisonous  atmosphere, 
which  lasted  on  an  average  about  12  seconds. 
No.  5.  I  placed  a  rabbit  in  a  glass  cylinder  and  pumped  in  an 
atmosphere  of  yf-^  of  1  per  cent,  of  H2S,  and  99  and  y9-^-  per 
cent,  of  air.  At  the  end  of  2  hours,  rabbit  showed  no  signs  whatever 
of  being  affected,  so  I  released  it. 
Result. — 1gg0  of  1  per  cent,  of  H2S,  and  99  and  -ffifa  of  air, 
after  two  hours  inhalation  ;  unaffected. 
EFFECT  OF  ILLUMINATING  OR  COAL  AND  WATER  GAS  ON  ANIMAL  LIFE. 
The  frequent  occurrence  of  accidental  deaths  from  illuminating 
gas  has  caused  me  to  make  a  series  of  experiments  on  this  subject 
with  a  view  to  determining  just  how  much  risk  we  run  in  having  a 
small  escape  of  gas  in  our  bed-rooms,  for  instance,  and  the  results 
obtained  ought  to  act  as  a  warning  to  all  who  are  anyway  careless 
in  turning  off  the  stop-cocks  before  retiring,  or  who  carelessly  turn 
the  gas  low  near  a  draft  and  find  it  blown  out  the  next  morning  and 
the  room  filled  with  gas. 
No.  1.  I  placed  a  rabbit  in  a  glass  cylinder  and  pumped  in  an 
atmosphere  of  75  per  cent,  of  illuminating  gas  (water  and  coal  gas) 
and  25  per  cent,  of  air.  Rabbit  was  immediately  seized  with  violent 
convulsions  and  death  ensued  in  2  minutes. 
Result. — 75  per  cent,  illuminating  (water  and  coal  gas)  and  25 
per  cent,  air,  2  minutes  inhalation ;  death. 
No.  2.  I  placed  a  rabbit  in  a  glass  cylinder  and  pumped  in  25  per 
cent,  of  illuminating  gas  (water  and  coal  gas)  and  75  per  cent,  air;  on 
