Page 

 Fig. 49. Simultaneous modifications of the number of respiratory- 

 movements R and pulse P under the influence of decom- 

 pression; (Cat, Experiment CCXXI) 670 



Same (Dog, Experiment CCXVIII) 671 



Same (Dog, Experiment CCXVII) 671 



Consumption of oxygen and production of carbonic acid at 



different pressures 677 



Asphyxia without carbonic acid 691 



Maxima and minima of cardiac pressure in asphyxia without 



carbonic acid 692 



Bird in air progressively rarefied and oxygenated 695 



Respiration of superoxygenated air expanded by decrease 



of pressure 697 



Sudden modifications in the pulse rate by intermittent respi- 

 ration of superoxygenated air 699 



Modifications in the pulse rate, during decompression, result- 

 ing from the continuous respiration of oxygen (Experi- 

 ment CCLVI) 705 



Same (Experiment CCLVII) 707 



Dogs poisoned by oxygen 739 



Dog during tonic convulsions of oxygen poisoning 741 



Apparatus of M. Jourdanet for the therapeutic use of com- 

 pressed or expanded air 757 



Fig. 63. Gas meter for the measurement of the respiratory move- 

 ments 758 



Fig. 64. Apparatus with double valve for the study of respiration___ 759 

 Fig. 65. Apparatus for the chemical study of the respiration of an 

 animal kept for any specified time in air of constant 



composition ^ 766 



Fig. 66. Apparatus for the observation of variations in the intrapul- 



monary air tension 771 



Variations of the intra-thoracic tension. Normal pressure___ 772 



Same. Compressed air 772 



Tension of the blood in the femoral artery. Normal pressure 773 



Same. Compressed air 773 



Tension of the blood in the carotid artery. Normal pressure 774 



Same. Compressed air 774 



Same. Normal pressure 774 



Oxygen consumption and carbonic acid production by a piece 



of meat in an atmosphere of constant oxygen content 813 



Death by carbonic acid; changes in the air of the bag (Experi- 

 ment DCXV) 915 



Death by carbonic acid; changes in the composition of the 

 gases of the blood, the respiration, and the circulation 

 (Experiment DCXV) 917 



XXXI 



