rce.--We found the addition of battery to
the Stubb's wire vibrator greatly increased the volume of spark. Several
persons could obtain sparks from the gas-pipes at once, each spark being
equal in volume and brilliancy to the spark drawn by a single person....
Edison now grasped the (gas) pipe, and with the other hand holding a
piece of metal, he touched several other metallic substances, obtained
sparks, showing that the force passed through his body."

. . . . . . . . .

"December 3, 1875. Etheric Force.--Charley Edison hung to the gas-pipe
with feet above the floor, and with a knife got a spark from the pipe he
was hanging on. We now took the wire from the vibrator in one hand
and stood on a block of paraffin eighteen inches square and six inches
thick; holding a knife in the other hand, we drew sparks from the
stove-pipe. We now tried the crucial test of passing the etheric current
through the sciatic nerve of a frog just killed. Previous to trying, we
tested its sensibility by the current from a single Bunsen cell. We
put in resistance up to 500,000 ohms, and the twitching was still
perceptible. We tried the induced current from our induction coil having
one cell on primary,, the spark jumping about one-fiftieth of an inch,
the terminal of the secondary connected to the frog and it straightened
out with violence. We arranged frog's legs to pass etheric force
through. We placed legs on an inverted beaker, and held the two ends
of the wires on glass rods eight inches long. On connecting one to the
sciatic nerve and the other to the fleshy part of the leg no movement
could be discerned, although brilliant sparks could be obtained on the
graphite points when the frog was in circuit. Doctor Beard was present
when this was tried."

. . . . . . . . .

"December 5, 1875. Etheric Force.--Three persons grasping hands and
standing upon blocks of paraffin twelve inches square and six thick drew
sparks from the adjoining stove when another person touched the sounder
with any piece of metal.... A galvanoscopic frog giving contractions
with one cell through two water rheostats was then placed in circuit.
When the wires from the vibrator and the gas-pipe were connected, slight
contractions were noted, sometimes very plain and marked, showing the
apparent presence of electricity, which from the high insulation seemed
improbable. Doctor Beard, who was present, inferred from the way the
leg contracted that it moved on both op