Symptoms of Decompression 663 



A: the rabbit weighs 770 gm.; pressure is maintained between 70 

 and 76 cm. 



B weighs 770 gm.; pressure oscillates between 45 and 50 cm. 



C weighs 840 gm.; pressure oscillates between 38 and 40 cm. 



At 2:30: for rabbit A, respiratory rate 70; for B, 80; for C, 120. 



They are removed at 6 o'clock without having shown any remark- 

 able phenomena. 



Temperature of A, 39.5°; of B and C, only 38°. 



March 3, experiment repeated with the same results. Rabbit B, 

 which was brought to 36 cm., then shows convulsive movements, which 

 do not last. It urinates under the bell; this urine contains no sugar. 



Experiment CCXXIII. March 18. Rabbit under a large bell of 31 

 liters. 



3: 15, for a quarter of an hour has been under a current of air at 

 diminished pressure; it has remained perfectly quiet, with a respira- 

 tory rate of 94, the pressure being 56 cm. 



3:20, pressure 46 cm., respiratory rate 86. 



3:25, pressure 42 cm., respiratory rate 66. 



3:30, pressure 42 cm., respiratory rate 64. 



3:38, pressure 35 cm., respiratory rate 70. 



3:50, pressure 15 cm., respiratory rate 90. 



3:53, pressure 16 cm., respiratory rate 45, shallow. 



Dies at 4 o'clock. Air admitted; the animal, which was swollen, 

 collapses. Dark blood in the left heart; a few pulmonary ecchymoses. 



Experiment CCXXIV. March 20. Rabbit of 2.7 kilos under the large 

 bell; temperature 20°. 



Placed at 2:26 under a current of air with diminishing pressure. 



2:30, pressure 56 cm., respiratory rate 105. 



2:36, pressure 41 cm., respiratory rate 99. 



There is a leak, air enters, and the pressure falls to O; respiratory 

 rate 81. 



2:46, pressure back at 50 cm., respiratory rate 138. 



2:50, pressure 44 cm., respiratory rate 105. 



2:54, pressure 36 cm., respiratory rate 120. 



3:10, pressure 27 cm., respiratory rate 102. 



Remains between 27 and 24 cm. until 4: 18; respiratory rate 84. 



The animal kept at the same pressure struggles violently at 6:20, 

 falls on its back, makes 3 or 4 deep respiratory movements, then 

 remains motionless, dies. 



Interior temperature of the bell is 20°; that of the rabbit 32°. 



Experiment CCXXV. May 22. Free rabbit in the large bell of 31 

 liters. At the beginning, respiratory rate 56. 



Pressure is rapidly lowered to 56 cm., and the animal is kept there 

 20 minutes; its respiratory rate increases to 60. 



Pressure lowered to 36 cm.; respiratory rate rises to 100. But the 

 animal remains quiet, without apparent inconvenience. 



Pressure lowered to 26 cm., to 22 cm., without the rabbit seeming 

 much affected. At 16 cm., symptoms appear. At 12 cm., it struggles 

 violently, is seized with general convulsions, and dies in a minute. 



