124 Mr. Todd’s observations and experiments 
about two hours afterwards, I found it impossible to elicit 
shocks from it by any irritation ; but it seemed to possess as 
much activity and liveliness as before, and lived as long as 
those animals from which shocks had not been received, and 
which had not undergone this change. 
Two of these animals being procured, the nerves of the 
electrical organs of one of them were divided after the manner 
above described. They were placed each in separate buckets 
of sea-water, and allowed to remain undisturbed. This ^vas 
performed in the morning, and when examined in the evening, 
t was impossible to distinguish between the liveliness or 
activity of either. 
Of two of these animals, the nerves of the electrical organs 
of one of them were divided. Being placed each in separate 
buckets of sea-water, they were both irritated as nearly alike 
as possible. From the perfect animal, shocks were received ; 
after frequent repetition it became weak, and incapable of 
discharging the shock, and soon died. The last shocks were 
not perceptible above the second joint of the thumb, and so 
w T eak as to require much attention to observe them. From 
the other no shocks could be received ; it appeared as vivacious 
as before, and lived until the second day. This experiment 
was frequently repeated with nearly the same results. 
The nerves of one electrical organ only being divided in a 
lively torpedo, from which shocks had been previously 
received, on irritating the animal it was still found capable of 
communicating the shock. Whether there was any difference 
in the degree of intensity could not be distinctly observed. 
One electrical organ being altogether removed, the animal 
still continued capable of discharging the electrical shock. 
