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

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178
Dr. A. D. Waller.

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