on the Generation of Animal Heat. 41 1 



air was preserved for examination. The thermometer in 

 the rectum had fallen to 91"^. The heart still acted with 

 regularity and strength. 



The second rabbit died in a few minutes after the inocu- 

 lation. The time was noted when the thermometer in the 

 rectum had fallen to 98', and he was placed under « bell- 

 glass. At the end of 30 minutes, the thermomeler in the 

 rectum had fallen to 92^. 



The air respired by the first rabbit contaiued -^'^ of car- 

 bonic acid. 



5CS + 52 + 2— 45 511 ^, ,, i- • i r i • 



• = -p- = 25*55 cubic inches or carbonic 



acid evolved in SO minutes, which is at the rate of 51' I 

 cubic inches in an hour. 



Experiment 6. — Thermometer 66°, barometer 30* 1 inch. 



Two rabbits, each occupying the space of 4S cubic 

 inches, were inoculated with wooiara. 



In one of them, when apparently dead, the circulation 

 was kept up by means of artificial respiration. He was 

 placed in the apparatus under the bell-glass, and the lungs 

 were inflated from 50 to 60 times in a minute.' At this 

 time the thermometer in the rectum stood at 97°. At the 

 end of 35 minutes, a portion of air was preserved for ex- 

 amination. The thermometer had now fallen to 90°. The 

 heart was still acting regularly. 



The second rabbit was allowed to lie dead. When the 

 thermometer in the rectum had I'al'cn to 97°, he was placed 

 under another bell elass. At the end of 35 minutes, the 

 thermometer had fallen to 90"'5. 



The air respired by the first rabbit contained -Jg- of car- 

 bonic acid. 



502+2 + 52-43 503 ». „, i- • , r i • 



,-: = -— - = 31.75 cubic inches ot carbonic 



It) u> 



acid evolved in 35 minutes, which is at the rate of 54*43 

 cubic inches in an hour. 



Experiment 7. — Thermometer 60°, barometer 30*2 inch. 



The experiment was repeated on a rabbit which had 

 been inoculated with the essential oil of almonds. When 

 he was placed under the bell-glass, the thermometer in the 

 rectum stood at 96-'. In a lew minutes he gave signs of 

 sensibility, and made efforts to breathe; but as these efforts 

 were at long intervals, the artificial respiration was con- 

 tinued. In half an hour he breathed spontaneously 40 

 times in a miimtc. The thermometer in the rectum had 

 fallen to 90". 



'Jlie air being examined, was found to contain -rV <>f 

 carbonic acid. Tl»« 



