AND ANIMAL LIFE. 77 



LXIX. We now come to the consideration 

 of the second inference, " that it (secretion) 

 may be restored, after it is thus destroyed, by the 

 galvanic influence? Experiments 46, 47, 48, 

 and 49, were performed for the purpose of 

 shewing that the influence of galvanism was 

 equivalent to that of the nerves. In the first, 

 46, in which the eighth pair of nerves were 

 divided and galvanism applied, neither dyspnoea 

 nor vomiting occurred : these invariably happen- 

 ed in every instance in which the lungs were 

 found congested with mucus, and covered over 

 with black patches ; consequently, their absence 

 shews that the circulation of the blood in the 

 pulmonary tissue was little altered ; and, more- 

 over, that its properties were but slightly modi- 

 fied. Such conditions being maintained, diges- 

 tion ought to proceed in the usual way ; and this 

 was found to be the case. The animal lived six 

 hours, and on examining the lungs the following 

 were the appearances : " The membrane of the 

 trachea was of a natural colour, and there was no 

 fluid in it. The ramifications of the bronchia in 

 the left lung were quite free from frothy mu- 

 cus. There was some fluid in the right lung, 

 though it did not appear much gorged ; there 

 was one dark spot on it. The lungs collapsed 

 imperfectly on opening the chest."* 

 Case 47. is very interesting, as it more strik- 



* Dr WILSON PHILIP on the Vital Functions, p. 125. 



