568 
Effect  of  Noxious  Gases. 
Am.  Jour.  Pharm. 
Dec,  1893. 
76,  says :  "  It  is  poisonous  and  its  action  on  arterial  blood  is  a  com- 
mon lecture  table  experiment." 
Ency.  Brit.,  Chemistry,  Vol  V,  p.  500,  says  :  "  It  cannot  be 
breathed  with  impunity,  frequently  giving  rise  to  nausea  and  vertigo, 
even  when  much  diluted." 
American  Ency.,  Vol.  IX,  p.  130,  says:  "Theuard  found  that  a 
small  bird  would  die  in  air  containing  fifteen  one-hundredths  of  I 
per  cent,  and  a  horse  in  air  that  contained  ^  of  1  per  cent." 
The  results  of  my  experiments  on  the  effect  of  H2S  on  animal 
life  are  as  follows : 
No.  1. 
1.  I  placed  a  rabbit  in  a  glass  cylinder  and  pumped  in  an 
atmospere  of  1  per  cent,  of  H2S  and  99  per  cent,  of  air. 
2.  I  placed  another  rabbit,  in  another  glass  cylinder  and  pumped 
in  an  atmosphere  of  1  per  cent,  of  H2S,  and  99  per  cent,  of  air 
simultaneously  with  the  No.  1,  using  two  Shaw  Gas  Testers  as 
mixers  for  the  operation,  both  connected  with  the  same  bag  of  H2S. 
Death  occurred  simultaneously  in  cylinders  Nos.  1  and  2,  at  the 
end  of  one  minute,  preceded  by  violent  convulsions  which  lasted 
about  10  seconds. 
Result. —  1  percent.  H2S  and  99  percent,  of  air,  1  minute  inhala- 
tion ;  death. 
No.  2. 
1.  I  placed  a  rabbit  in  glass  cylinder  No.  i,and  pumped  an  atmos- 
phere of  •  5  of  1  per  cent,  of  H2S  and  99-5  per  cent,  of  air. 
2.  I  placed  another  rabbit  in  glass  cylinder  No.  2,  and  pumped  in 
an  atmosphere  of -5  of  1  per  cent,  of  H2S  and  99-5  per  cent,  of  air, 
simultaneously  with  No.  1,  using  2  Shaw  Gas  Testers  as  mixers  for 
the  operation,  both  connected  with  the  same  bag  of  H2S.  Death 
occurred  simultaneously  in  cylinders  I  and  2,  at  the  end  of  three 
minutes,  preceded  by  violent  convulsions  which  lasted  about  15 
seconds. 
Result. — -5  of  1  per  cent.  H2S  and  99- 5  per  cent,  air,  3  minutes 
inhalation;  death. 
No.  3. 
1.  Igplaced  a  rabbit  in  glass  cylinder  No.  1,  and  pumped  in  an 
atmosphere  of -2  of  1  per  cent,  of  H2S,  and  99  8  per  cent,  of  air. 
2.  I  placed  another  rabbit  in  glass  cylinder  No.  2,  and  pumped  in 
