Page 

 Fig. 22. Confined air which has become lethal under pressures from 



20 centimeters to 24 atmospheres 576 



Graduated syringe for the extraction of blood 582 



Mercury pump set up for the extraction of the gases of the 



blood 583 



Small mercury reservoir 588 



Bellows for artificial respiration 591 



Large apparatus for the study of low pressures 595 



Dog prepared to be placed in the cylinders of Fig. 27, and for 



the extraction of blood under decreased pressure 596 



Different forms of cannulae for the extraction of blood under 



decreased pressure 598 



Extraction of the blood of an animal under decreased pres- 

 sure 599 



Decrease of the quantities of Oa and C0 2 contained in the 



arterial blood, when the barometric pressure is diminished 608 



Percentage decrease of the 0= and the C0 2 of the arterial 



blood when the barometric pressure is diminished,-- 611 



Large compressed air apparatus, cylinder of sheet steel cap- 

 able of withstanding a pressure of 12 atmospheres 616 



Extraction of blood from an animal placed in compressed air 618 



Variations of the gases of the blood at pressures above one 



atmosphere 623 



Fig. 36. Increase of the oxygen of the arterial blood from to 10 



atmospheres and from to 26 atmospheres 624 



Dog breathing air from a rubber bag 629 



Variations of the gases of the blood and the oxygen of the 

 air in asphyxia in closed vessels, when the carbonic acid 

 is absorbed 633 



Variations in the gases of the blood in asphyxia compared 

 to decreased pressure 635 



Decrease of the gases of the arterial blood and the venous 



blood when the tension of oxygen breathed decreases 639 



Flask arranged for saturating blood with oxygen under dif- 

 ferent decompressions 644 



Water motor shaking the flask containing the blood to be 

 saturated with oxygen 645 



Capacity of the blood for absorbing oxygen at pressures be- 

 low one atmosphere 648 



Apparatus to bring blood into contact with the air at a speci- 

 fied decrease in pressure 650 



Apparatus for saturating blood with air at high pressures 654 



Oxygen capacity of the blood from a vacuum to 18 atmos- 

 pheres of air 656 



Modification of the number of respiratory movements under 



the influence of decompression. (Dogs, rabbits) 667 



Same (Guinea pig, Experiment CCXXVII) 668 



XXX 



