OF THE ELECTRICAL ORGAN OF TORPEDO MARMORATA. 
517 
Closure. 
Deflection. 
•014--016 
•016-018 
•018-2 
•02 --022 
•022-024 
•024--026 
•026-03 
•03 on 
Galvanometer without shunt. 
0 
+105; + 115 
+ 308 ; + 310 
+ 360 
+ 95 
+ 90 
+ trace 
0 
Galvanometer closure 
The right organ of the animal gave a response of -f 50 with G. y^-g, and the 
decline of this response is much slower. 
Closure. 
Deflection. 
•014--016 
G. +. 
0 
•016--018 
+ 95 
•018-02 
+ 380 
•02 --03 
+ 220 
•03 --04 
+ 15 
•04 --05 
+ 10 
•05 - 06 
Galvanometer closure 
Even a large Torpedo may give a response of short duration, but the response in 
such cases is always small in amount, and is, in fact, minimal. 
Apart from the necessary effect of the vigour of the organ, there is that of the size 
of the fish, and so of the columns. The larger the fish, other things being equal, the 
longer the duration of what must be considered as the true response. This is shown 
by the results embodied in the annexed Table, in which the length of the columns of 
the organ is given. 
I = length of column, r = total response. 
Time of galvanometer closure: 
•01"-015" 
CN 
O 
j 
o 
•02"--025" 
•025"--03" 
•03"--035" 
•035"--04" 
■04"--045" 
•045"-05" 
Small Torpedo, l — 12 mm. 
G. jL 
+ 12 
+ 492 
+ 400 
+ 45 
+ 20 
+ 20 
+ 4 
Ditto. G. T V • 
0 
+ 400 
+ 470 
+ 60 
+ io 
+ trace 
• * 
• « 
