570 
Effect  of  Noxious  Gases. 
<  Ani.  Jour.  Phanxu 
I        Dec,  1893. 
the  third  inhalation  the  rabbit  was  seized  with  violent  convulsions 
and  urinated  freely ;  at  the  end  of  one  minute  convulsions  ceased, 
and  at  the  end  of  4  minutes  death  ensued. 
Result. — 25  per  cent,  illuminating  gas  (water  and  coal  gas)  and 
75  per  cent,  air,  4  minutes  inhalation;  death. 
No.  3.  I  placed  a  rabbit  in  a  glass  cylinder  and  pumped  in  15  per 
cent,  of  illuminating  gas  (water  and  coal  gas)  and  85  per  cent,  of  air; 
without  any  struggling  it  sank  into  a  comatose  state  ;  at  the  end  of  3 
minutes  it  struggled  feebly  ;  at  the  end  of  4  minutes  urinated  ;  and 
at  the  end  of  6  minutes  death  ensued. 
Result. — 15  per  cent,  illuminating  gas  (water  and  coal  gas)  and 
85  per  cent,  of  air;  6  minutes  inhalation;  death. 
No.  4.  I  placed  a  rabbit  in  a  glass  cylinder  and  pumped  in  10  per 
cent,  of  illuminating  (water  and  coal)  gas  and  90  per  cent,  of  air  ; 
at  the  end  of  13  minutes  rabbit  was  seized  with  convulsions  and 
died  in  5  seconds. 
Result. — 10  per  cent,  illuminating  (water  and  coal)  gas  and  90 
per  cent,  air;  13  minutes  inhalation;  death. 
No.  5.  I  placed  a  rabbit  in  a  glass  cylinder  and  pumped  in  an 
atmosphere  of  5  per  cent,  of  illuminating  (water  and  coal)  gas  and 
95  per  cent,  of  air.  At  the  end  of  10  minutes  rabbit  was  seized  with 
strong  convulsions  which  lasted  20  seconds ,  at  the  end  of  20  min- 
utes rabbit  commenced  to  gasp  ;  and  at  the  end  of  30  minutes  death 
ensued. 
Result. — 5  per  cent,  illuminating  (water  and  coal)  gas  and  9$ 
per  cent,  of  air ;  30  minutes  inhalation  ;  death. 
I  did  not  analyze  the  illuminating  gas  for  its  constituents  but  the 
gas  used  was  Philadelphia  city  gas,  and  I  believe  it  contains  about 
30  per  cent.  CO. 
I  have  other  experiments  on  hand  on  CH4  carburetted  hydrogen 
or  fire  damp,  also  the  effect  of  carbon  dioxide  or  choke  damp  on 
lights,  the  results  of  which  it  will  afford  me  pleasure  to  make  known 
in  my  next  paper. 
