OF THE ELECTRICAL ORGAN OF TORPEDO MARMORATA. 
509 
Excitation of nerve 43 millims. from organ. 
Closure .... 
•016"--017" 
*017"—•018” 
■018"--019" 
*019"--02" 
■02"--021" 
•021"--022" 
Deflection 
0 
0 
0 
0 
+ 50 
+ 65 
+ 310 
This gives to”oo" as the time of transmission along 20 millims. of nerve, a rate of 
6’6 metres per second. 
A third experiment was made upon a nerve-organ preparation of a large vigorous 
Torpedo, measuring 52 cm. X 37 cm. The fish had been kept at 12° C., and the 
preparation differed from the preceding, since it consisted of one long uninjured 
column surrounded by cut columns. This column measured 6 centims. in length, and 
was 5 millims. in cross-section. The nerve entering it was carefully dissected out, 
and measured 8 centims. in length. The very large organ-current was allowed to 
subside, the experiment being deferred for an hour or more. A small patch of 
skin remained on each end of the column, and was led off in the usual way : 
O.C. = + •0031 R. Induction apparatus as in preceding experiment. 
Excitation of nerve 65 millims. from organ. 
Closure . 
•01"--012" 
•01"-*014" 
•014"-*016" 
•016"-018" 
•018"--02" 
•02"--022" 
Deflection .... 
0 
0 
0 
+ 70 
4 140 
4- co 
Excitation of nerve 25 millims. from organ. 
Closure .... 
•01"-*012" 
•011"--013" 
•012"--014" 
Deflection 
0 
4 120 
4 co 
Excitation of nerve 65 millims. from organ. 
Closure .... 
•015"--016" 
*016”—*017” 
•017"--018" 
Deflection 
0 
0 
+ 70 
