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NITRATE  OF  AMMONIA  AND  NITROUS  OXIDE. 
so  as  not  to  generate  too  much  carbonic  acid.  Both  it  and  oxygen 
are  of  primary  importance  in  asphyxia.  In  chemical  character 
and  physiological  influence  they  are  the  direct  opposites  and 
natural  antidotes  to  narcotizing  agents  and  asphyxiated  condi- 
tions. They  should  always  be  employed  whenever  practicable, 
as  either  alone  or  in  combination  with  heat  they  will  often  save 
life,  even  in  apparently  hopeless  cases." 
