088 MESSRS. A. WALLER AND A. DE WATTEVILLE OH THE IHFLUENCE 
Tracings 15 20 : Illustrate the same facts as Tracings 8—11, and show more clearly 
the after-effects. 11,000 ohms additional resistance in circuit. 
Induction 
current. 
Distance 
of coil. 
During’. 
After. 
Galvanic 
current, 
Tracing 15. 
centims. 
4 
increased 
diminished 
50 cells (3’5 m.w.). 
Tracing 16. 
+ 
0 
diminished 
increased 
_ 
Tracing 17. 
— 
5 
diminished 
increased 
+ 
Tracing 18. 
— 
0 
diminished 
increased 
+ 
Tracing 19. 
+ 
0 
increased 
diminished 
+ 
Tracing 20. 
—< 
5 
increased 
diminished 
The greater increase 
of F - 
by G — than of 
F + by G + is seen in the comparison 
of Tracing 19 with Tracing 20; the greater diminution of F — by G + than of F + 
by G — in the comparison of Tracing 10 with Tracing 11. 
The diminution of F — after G — (Tracings 8, 15, 20); the diminution of F -j- 
after G + (Tracing 9); and the superiority of the former over the latter are also 
to be recognised in Tracings 15-20 especially. Likewise the increase of F — after 
G + (Tracing 17), the increase of F + after G — (Tracing 18), and the superiority 
of the former over the latter. The make induction contraction is seen in Tracing 11. 
Tracings 21-24 show the effect of the break induction current with increasing strength 
of a galvanic current in the same circuit. No additional resistance in circuit. 
Tracing 21. Induction kathodic contractions with increasing galvanic current in the 
same direction. The first group of five contractions is taken in the absence 
of galvanic current, the second with a current of 2 cells . . ., the last with a 
current of 20 cells. (In the next three tracings the galvanic current is 
increased as in this by 2 cells with each successive group.) Distance of coil 
10’5 centims. 
Tracing 22. Induction anodic contractions with increasing galvanic current in the same- 
direction. Distance of coil 9 centims. 
Tracing 23. Induction kathodic contractions with increasing galvanic current in the 
opposite direction. The contractions are much reduced with 4 cells, 
abolished with 6 cells. Distance of coil 9'5 centims. 
Tracing 24. Induction anodic contractions with increasing galvanic current in the 
opposite direction. The contractions decrease as the current increases to 
12 cells, increase as the current increases from 14 cells. Distance of coil 
8 centims. 
