8 



PHYSIOLOGY 



CHAP. 



gasometer 0. Before mixing with the air of the chamber it passes through 

 a faltering bottle containing caustic potash and also through a meter which 

 registers the quantity of oxygen entering the chamber. 



(6) Pettenkofer objected to apparatus constructed on the preceding 



principle, on the ground that in course of time products of the exhalations 



the body, which are injurious to health, accumulate and are not fixed by 



potash, as is the carbon dioxide. He therefore in collaboration with Voit 



Fio. 2. Apparatus of Hoppe-Seyler. 





