gg J. Lindhard. 



was hung lower than the receiver. When the tap was opened on 

 taking the sample, the mercury ran out of the receiver with great 

 rapidity. 



The air-sample was led over to the analysing apparatus by 

 means of a lead-pipe. The "dead space", formed by the glass-tube 

 above the tap, the lead-pipe and the connecting tube, was done away 

 with by causing excess of pressure in the receiver and opening the 

 tap a moment before the connection with the analysing apparatus 

 was completed. 



The analysis proceeded as described for the expired air; only 

 it proved necessary, owing to the greater amount of carbonic acid 

 contained in the alveolar air, to lead over the air-sample several 

 times. I always made sure that the absorption was complete by 

 taking over one extra sample for control. 



