METHOD FOR DETERMINING RESPIRATORY RXPHANOl IN MAN 





Respirations are commenced with the three-way valve turned so as I 

 allow the expirations to pass directly outside After respiral equi- 

 librium 'is established, the three-way valve is turned during an inspira- 

 tory period so thai the bu< ling expirations may pass into the '•■ 



The time required to fill the bag comfortably is determined with a stop- 

 watch. The air which has been collected in the bag durii i"'i 

 is thoroughly mixed and passed through a meter, the temperature and 

 barometric pressure are noted, and a sample analyzed in the Ilal<i. 



B. ■ 

 Pig. 181 II ipling hi 



gas-apparatus. The bag should be emptied completely by rolling it up 

 when nearly empty. 



5 The Haldane Gas-analysis Apparatus. PRINCE*] i .—The Hal. Ian.' 

 method of analysis of expired air is simple ami easily learned. The ap- 

 paratus (Pig. l s l consists of a gas burette, a control buretl th" 

 same Bize (both surrounded with a water jackel . and bulbs containing 

 dilute caustic potash or soda solution for the absorption of the carbon di- 

 oxide and an alkaline pyrogallate solution for the absorption i 



