RESPIRATION. 



[CH. I 



with glass tubes. One tube is connected with an aspi- 

 rator so that a current of air is drawn through the vessel 

 and keeps up continuous normal respiration. The other 

 tube serves to admit to the flask air free from C0 2 ; for 

 this purpose it is connected with a filtering bottle F 

 containing a few sticks of KHO 1 . The air is admitted to 

 ^through a tube T filled with soda-lime. To make sure 

 that no extraneous CO 2 enters the flask, another washing 

 bottle B containing baryta-water is fitted between F and 

 the experimental flask, A. The drop-aspirator figured by 



FIG. 2. Exp. 3. 



Detmer* answers well; it is made from a distillation tube 

 and is attached to a tap through which a current of water 



1 We now use a washing bottle containing KHO instead of the 

 arrangement shown in the figure [1895]. 



2 Praktikum, p. 179, fig. 76. 



