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A MANUAL OF VETERINARY PHYSIOLOGY 



Fig. 52. — Respiration Apparatus. 



The face mask ; 2, rubber connections with 6 and 7 ; 3, pneumatic collar to 

 render mask air-tight above ; 7, inlet tube to bag ; 8, valve-box through 

 which the expired air passes co 10, a rubber bag of 20 cubic feet capacity. 

 After an experiment the air is pressed out of the bag, and, passing through 

 11, is measured in the meter. 4, A chamber containing a tray of coke 

 saturated with caustic potash, through which the inspired air passes and is 

 robbed of its C0 2 before entering 5. 



Fig. 53. — Horse in Position on Respiration Apparatus. 



