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Scientific Proceedings (84). 



per cent, solution of a standardized CO saturated blood kept 

 sealed in the ice chest from which a 1 per cent, standard may be 

 made from time to time. The standard solutions must at all 

 times be protected from bacteria and kept saturated with CO, 

 also controls should be made from time to time with blood of 

 known oxygen capacity. The 0.4 per cent ammonia solution is 

 also used in making up the standard. 



