540 LIVING TORPEDOS IN BERLIN. 



2. Torp. Fresh. I'-P. 



C To". 0154. CT o"-o764. 



f - v I ~ X I + 2 XXX ! +4 '5t + 9 1+51+7 II I + "-5t + 10 | +9! +15 

 8. V 'ii-5 I 5 ' i 18 | 18-5 i 18 I 18 (I i 82 | 83 I 83 I 82-5 



Only half the length of nerve. CT i".O24. 



|| t +14 | +10; 6 t + 10; 9-5 II | -2o| -17 I 20 | -20 

 II j 162 i 164; 162-5 I l62 J J o3-5 II i "7 1 I I0 79 i "7 1 I J o63. 



As the strength of the primary current seemed to be very nearly 

 doubled with half the length of nerve (162-8 instead of 165-2), the 

 current density was not (as one might have supposed) on account 

 of the large transverse section of the nerve, less than in the experi- 

 ments on sensory roots of the frog. A more decided negative to 

 the question proposed could not be given by the experiment. Still 

 I was not deterred thereby from renewed endeavours, which had 

 however no other result. This time 20,000 turns were used with 

 the galvanometer S at zero distance. 



4. Torp. Fresh. I'P. 



CTo"-oo3i. First nerve. CTo"-oi23. 



S.-X. t +5 - 



| -4t +5 

 I 2 I 2 | 



I c 



( 



i 



-3 XX.- t +5 -2 



P. | 2 I 2 I 2 | 2 || | 3-5 1 3 



CTo"-o3io. 



t-m-i.-i tr-?;-o-5 



I 1 + 3' +4-5 1 + 5 + 6 

 I 10 4 10 ; 10 | 10; 10 



S.-XX. I c-_? t }-? I \ -?; -? t | -o-s 



+I 4 \ +10 | \ +10-5 + 7 ( +12 



P. i 2-2 | 22 | 21-5; 2L5 | 21-5 



C T o"-o3 1 o. Second nerve. 



8. XXX. | + 15 t + 16 I + 7-5 t +1 



P. 4 25.5 I 24 ; 24 | 24 



After completing this series of experiments, it was discovered that 

 in one place of the battery current, the conduction was imperfect ; 

 it was the same fault which had caused the derangement recorded 

 above (p. 536). Still it does not seem that this would tend to 

 diminish the significance of the negative result obtained, nor when 

 we consider the variety of combinations of current densities and 

 times of closing which were tried, is it to be expected that any later 

 result will make any change in the conclusion now arrived at. We 

 should however do wrong to rest perfectly satisfied, until the ex- 

 amination has been extended to other nerves of which the consti- 

 tuent fibres are physiologically homogeneous. 



