Page:Proceedings of the Royal Society of London Vol 69.djvu/192

178 Experiment 6. Direct Excitation. Fresh Pad of same Cat on the 3rd day after death. Excitation as in Experiment 5. Outgoing response through- out. Considerable Diminution of Resistance during Experiment.

In primary circuit.

Direction of break.

Readings on scale.

Mean readings.

Mean voltage.

Conduc- tivity.

1L.

f

-2 + 3 + 1

+ -0004

21

+ 12+12 +12

+ -0057

2L.

+

+ 7 + 9 +8

+ -0030

26

+ 18+15 +16

+ -0061

3 L.

+

+ 30 +18 +24

+ 0-0083

29

+ 28+22 [ + 25

+ -0086

4L.

+

+ 42 +30

+ 36

+ -0109

33

+ 25+23 +24

+ 0-0072

6L.

+

+ 45 4-50 +47

+ 0-0120

39

\ 23 + 25

+ 24

-*- -0061

8L.

+

+ 40+60 +50

+ -0138

36

+ 23+22 +22

+ -00610

FIG. 6.

Voit -ooso -oioo on

Experiment 7. Direct Excitation. To illustrate summation of effects. Large pad of cat's foot set up 24 hours post mortem. Tetanisation for 5 seconds at intervals of 1 minute. Break shock ingoing ; response outgoing. Berne coil; 2 Leclanches, at 1000 units in 1st group, at 2000 units in 2nd group. Compensation was adjusted at the com- mencement of each group, and left unaltered during the series ; the galvanometer being short-circuited during each tetanisation, the spot then falls to the zero level