94 EFFECTS OF 



continued to contract. He was placed in a tem- 

 perature of 80, and a tube being introduced 

 into the nostril, the lungs were artificially in- 

 flated about 36 times in a minute. 



When the artificial respiration had been main- 

 tained for four minutes, he appeared to be re- 

 covering; he breathed voluntarily 100 times in 

 a minute, and showed signs of sensibility. The 

 artificial respiration was discontinued. The vo- 

 luntary respiration continued about nine minutes, 

 when it had ceased, and the animal was again 

 apparently dead ; but the pulse continued strong 

 and frequent. The lungs were again artificially 

 inflated. At the end of four minutes the animal 

 once more breathed voluntarily 100 times in a 

 minute, and repeatedly moved his limbs and 

 eye-lids. The pulse became slower and more 

 feebk. 



In a few minutes the voluntary respiration 

 again ceased, and the artificial respiration was 

 resumed. The pulse had fallen to 100, and 

 was feeble. The animal again breathed volun- 

 tarily ; but he ceased to do so at the end 

 of five minutes. The lungs were inflated as 

 before ; but he did not give any sign of life, 

 nor was the pulse felt afterwards. On opening 

 the thorax, the heart was found to have entirely 

 ceased acting. 



A probe having been introduced into the sub- 

 stance of the spinal chord, it was found that by 

 means of the Yoltaic battery, powerful contrac- 

 tions might be excited, not only of the voluntary 



