394 CHANGES PRODUCED IN AIR BY RESPIRATION. 



Oxigen gas re- upon oxigen gas by the process of respiration. The water 

 epired. gasometer was filled with oxigen gas made from the hyper- 



oxigenised muriate of potash by heat, care having been 

 taken to clear all the tubes, &c. as much as possible of com- 

 mon air, by forcing a quantity of oxigen gas through them. 

 One hundred parts from the water gasometer being 

 treated with the usual tests in the eudiometer, a residuum 

 of only 2*5 was left; so that 97*5 per cent were pure oxigen, 

 and the rest azote. 

 Fulse quick- The register of the water apparatus being noticed, and 

 cne< *> the operator having prepared himself as usual by a forced 



expiration, began to respire; his pulse was 72; and at the 

 end of 9 minutes and twenty seconds, the experiment. was 

 concluded by a forced expiration, when the pulse was raised 

 to 88. 



Barom. Therm. Time. 

 Faht. 



29'5 53° 9'20" 



and natural The operator felt a general glow over the body to the 



heat increase . ^^ extremities, with a gentle perspiration; this however 

 went off in a few minutes, and no remarkable deviation from 

 the ordinary state was experienced. 

 Component . A portion having been saved, as usual, from each of the 

 CmiNri'ieM mercurial gasometers, for an average, 

 100 parts contained 



1 1 carbonic acid, 



expired gas. 



6 azote, 



100 

 The examination repeated gave the same results. 



Calculation for Carbonic Acid, 



100: 11:: 3193: 351-23, 



consequently* 351*23 cubic inches of carbonic acid ga§ 

 were formed in 9' 20", or 37'64 cubic inches in a minute. 

 More c*rboni$ Were it is plain, that a greater quantity of carbonic acid 

 acid formed, was formed from oxigen than from common air, in the same 



