37^ EfFECTS OF GALVANISM ON AVIMAIiS. 



is generally the case) confine my experiments to the infer'iof 

 parts only of the frog, but made them on the superior also. 

 The first moist- I then moistened both upper and lower extremities of 

 ened with oxi- ^|jg j-j.^^ killed by electricity with oximuriatic acid, and im- 

 muriatic acid, ,. , ,. i , . . , ^ , ' 



without effect, mediately applied the positive and negative wires of the 



above trough, but with as little success. 

 ^But six hours Having left them on the table, to attend to some other 

 after it was con- experiment in another room, I did not return to remove 

 ffle^pair of* '" them till about six hours after the experiment, when 1 was 

 p.'ateK. much surprised to observe the head of the latter frog appear 



more healthy than when I left it. It being late in the even- 

 ing, I began to lament, that I had emptied atid cleaned my 

 trough, as I wished to try its effects a third time; but from 

 the appearance I was tempted to try the effect of a pair of 

 zinc, and silver plates of 1| in. diameter, and the convul- 

 sive motion produced by this small power far exceeded my 

 most sanguine expectation. 

 Two mice 1 2,lso killed two mice, one by dividing the vertebras of 



killed. the neck, the other by confining it under a bell glass con- 



taining about a pint of atmospheric air. The first mouse 

 was powerfully excited by a pile of 60 pairs of zinc and 

 copper plates moistened with solution of muriate of soda. 

 Theonebysuf- But the same pile produced so small a degree of motion in 



focation not ex- ^j^g second mouse, that I can scarce say whether it moved 

 (Cited. , ' -^ 



or not. 



Two frogs gal- After having performed a variety of experiments before 

 wa^e a numerous company with four troughs of 106 pairs of 



plates, containing 5360 inches surface, I placed the posi- 

 tive and negative wires in a glass jar of water, in which 

 were two large frogs. The instant both the wires touched 

 the water, the frogs betrayed the greatest signs of uneasi- 

 ness, so much that some gentlemen requested- me to remove 

 the wires. I complied with their request, but observed, 1 

 had every reason to believe they would not survive. The 

 died 1q two result was, that on the next day (being left in the water) 

 ^^y^* they appeared very languid, and on the second day they 



"were dead. 



Perhaps, Sir, I may presume too far, in submitting my 

 theory or opinion on the above experiments; but if I err, 

 X am open to conviction, and shall esteem it a particular fib» 

 vour to be coryected by any of your scientific readers. 



X concerre^^ i 



