Compressed Air; Low Pressures 761 



Urine from Nov. 9 to Nov. 10 .... C. 



November 10. Seated in the apparatus at 2:35. 



Maximum expiration 3.8 liters; calm respiration is 7.6 per minute, 

 equivalent to 6.3 liters, or 0.83 liters for each expiration; pulse 68. 



Closed the doors at 2:55. 



At 3:20, compression of +37 cm.; maximum expiration 3.8 liters. 



At 3:38, +56 cm.; maximum expiration 4 liters. 



At 3:50, same pressure; 8.1 respirations per minute, equivalent to 

 6.7 liters, or 0.82 liters per expiration. 



At 4:25, same pressure; calm expirations give 6.2 liters per minute, 

 without counting the number. 



At 4:50, same; 6.5 liters per minute. 



At 5 o'clock, the same; pulse 69. 



At 5:10, the same; maximum expiration 4 liters. 



At 5:37, the same; began the decompression. 



At 5:45, pulse 63. 



At 6:15, pressure +15 cm.; pulse 60. 



At 6:20, pressure +10 cm.; calm expirations give 6.2 liters per 

 minute. 



Normal pressure at 6:30. 



Urine from Nov. 10 to Nov. 11 .... D 



November 11. End of the experiment at noon. 



The urine was analyzed by the Grehant method, but the analysis 

 was lost. 



Experiment CCCXXIII. November 15. I enter the apparatus with 

 a rather severe cold in the head, a cough, and tracheal pains showing 

 the beginning of a cold in the chest. 



At 2:40, at normal pressure, my maximum expiration gives 3.75 

 liters. 



At 2:50, pulse 77.7. 



From 2:55 to 3:05 ,breathed quietly into a bag .... A 



Ordinary expirations as reckoned on the gasometer give 6.5 liters 

 per minute. 



Respiratory rate 9. 



At 3:10, compression begun. 



At 3:55, compression of +52 cm.; pulse 65. 



At 4 o'clock, compression +60 cm.; maximum expiration 4.08 

 liters. 



At 4:20, compression +56 cm.; respiratory rate 7.5. 



At 4:30, same; pulse 62.5. 



Calm expirations give 5.86 liters per minute. 



From 4:45 to 4:50, breathed quietly into a bag . . . . B 



At 4:52, began the decompression. 



At 5 o'clock, pressure +40 cm.; calm expirations give 5.93 liters 

 per minute. 



At 5:15, pressure +32 cm.; the snuffles which had left me begin 

 again as does the heaviness in the head; some minutes after, (pres- 

 sure +20 cm.) the cough reappears. 



At 5:55, normal pressure. Pulse 65; the pulmonary ventilation 

 gives 6.28 liters per minute; maximum expiration is 3.8 liters. 



