locomotion upon the canal, and the company offered a reward for the
best device that could be suggested in that direction. A committee was
appointed to examine and report upon the merits of the various plans
submitted. While the subject was under discussion one boat-owner,
Captain Binns, made an experiment upon his own account.

He had a pair of particularly stubborn mules to haul his boat, and
it occurred to him that he might devise some scientific method of
inducing the said mules to move whenever they were inclined to be
baulky. Both mules had phlegmatic temperaments; and when they made up
their minds to stop, they would do so and refuse to go, no matter with
what vigor the boy applied the whip. Captain Binns therefore bought a
tow-line made of three strands of galvanized wire; and placing iron
collars upon the necks of the mules, he fastened the wire to them, and
then he got a very strong galvanic battery and put it in the cabin
of the boat, attaching it to the other end of the line, forming a
circuit.

[Illustration: A PERPLEXED MULE]

The first time the mules stopped to reflect, the captain sent a strong
current through the wire. The leading mule gave a little start of
astonishment, and then it looked around at the boy upon the tow-path
with a mournful smile that seemed to say, "Sonny, I would like to know
how you worked that?" But the mules stood still. Then the captain
turned a stronger current on, and the mule shied a little and looked
hard at the boy, who was sitting by whittling a stick. The captain
sent another shock through the line, and then the mule, convinced
that that boy was somehow responsible for the mysterious occurrence,
reached over, seized the boy's jacket with his teeth, shook him up and