parts project as to practically join
them by a wet connection. Cleaning this off and protecting the
binding parts with insulating tape we managed to get on, the spark
being by no means strong, and the reserve battery for some reason
weak.

If we had had a small buzzer, such as is sold for a song at every
electrical store, to say nothing of a pocket voltmeter, we would
have discovered in a moment that the reserve battery contained one
dead cell, the resistance of which made the other cells useless.
At Batavia we tested them out with an ordinary electric bell,
discovering at once the dead cell.

After both batteries are so exhausted that the spark is weak, the
current from both sets can be turned on at the same time in two
ways; by linking the cells in multiples,--that is, side by side,
or in series,--tandem.

The current from cells in multiples is increased in volume but not
in force, and gives a fat spark; the current from cells in series
is doubled in force and gives a long blue hot spark. Both sparks,
if the cells are fresh, will burn the points, though giving much
better explosions.

As the batteries weaken, first connect them in multiples, then, as
they weaken still more, in series.

Always carry a roll of insulating tape, or on a pinch bicycle
tire-tape will do very well. Wrap carefully every joint, and the
binding-posts of the cells for the tape will hold as against
vibration when the little binding-screws will not. In short, use
the tape freely to insulate, protect, and support the wires and
all connections.

If the machine is wired with light and poorly insulated wire, it
is but a question of time when the wiring must be done over again.

When we pulled up in Batavia at an electrician's for repairs, the
Professor was a sight--and also tired. The good man had floundered
about in the mud until he was picturesquely covered. At the outset
he was disposed to take all difficulties philosophically.

"I should regret exceedingly," he remarked at our first
involuntary stop, "to return from this altogether extraordinary
trip without seeing the automobile under adverse conditions. Our
experiences in the sand were no fault of the machine; the
responsibility rested with us for placing it in a predicament from
which it could not extricate itself, and if, in the heat of the
moment and the sand, I said anything derogatory to the faithful
machine, I express my regrets. Now, it seems, I shall have the
pleasure of ob