fcFAFF ON RESPIRATION. -*^3 



mult be diminifhed in the fame proportion of 100 to 80, and 

 thus proves 0,803 cubic inches. 



y. In another experiment 60 cubic inches were refpired 

 once in the time of 10 or 12 feconds, and the lad portion of 

 the expired air was received over mercury. The proportion 

 of the conftituent parts after refpiration, were in the centenary 

 4,68 carbonic acid gas, 17,68 oxigen gas, and 77,74 azote 

 gas. An eudiometric experiment made at the fame time on 

 the atmofpheric air, gave I carbonic acid, 22 oxigen gas, 

 and 77 azote gas. The true quantity of azote gas found as 

 before, by diminishing the 77,74 T ^, is, 75, 5S. And this 

 being fubtracled from 77, the quantity of azote gas previous 

 to the refpiration leaves 1,42 for the azote which difappeared, 

 fuppofing the refpired air to be divided into 100 parts. Bat 

 if we take the real number in inches, which was 60, this 

 quantity will be exprefled by 0,852 cubic inches. 



10. 30 Cubic inches were refpired in the fame manner 

 three times during 16 feconds. The expired air contained in 

 the centenary 5 ^carbonic acid gas, 14,5 oxigen gas, arid 

 80,5 azote gas. The atmofpheric air contained by experi- 

 ment at the fame time, 1 carbonic acid gas, 29,75 oxigen gas, 

 and 80,025 azote gas. This by the fame procefs of computa- 

 tion gives, a diminution of 4,235 in the 100, or in cubic 

 inches 1,2705. 



Thefe experiments which were feveral times repeated, and Remarks™ 

 constantly with the fame refult, deciiively fliew that azote 3^, 

 gas is abforbed in the aft of refpiration, and the active part it 

 performs. Hence we may more eafily underftand, why azote 

 gas compared with other mephitic gafes is lb little noxious to 

 our lungs ; fo that according to the experiments of Lavoiner 

 and Seguin, animals live very well in a mixture of 15 parts 

 azote gas, and one part oxigen gas ; whereas the fame animals 

 were fuddenly fuffocated in a mixture of 40 parts oxigen gas, 

 45 azote gas, and 15 carbonic acid gas. Hence we may 

 i comprehend, at leaft to a certain extent, the extraordinary ehWts 

 of the gafeous oxide of azote; we may form fome notion of 

 the transformation of the chyle, which is lefs anamalized or 

 azotized in the lymphatic part of the blood, but becomes 

 more fo in the act of refpiration. But the quantity of azote 

 gas abforbed by one (ingle refpiration is not very confiderable, 



v\ hich 



