te see
what you mean."

"You need a rest, dad," said Mr. Swift's son kindly. "I want you to
forget all about patents, invention, machinery and even the gyroscope
for a week or two. When I get my motor-boat in shape I'm going to take
you and Ned Newton up the lake for a cruise. We can camp out, or, if
we had to, we could sleep in the boat. I'm going to put a canopy on it
and arrange some bunks. It will do you good and perhaps new ideas for
your gyroscope may come to you after a rest."

"Perhaps they will, Tom. I am certainly tired enough to need a
vacation. It's very kind of you to think of me in connection with your
boat. But if you're going to get it this afternoon you'd better start
if you expect to get back by night. I think Mrs. Baggert has dinner
ready."

After the meal Tom selected a number of tools from his, own particular
machine shop and carried them down to the dock on the lake, where his
two small boats were tied.

"Aren't you going back on your motor-cycle?" asked his father.

"No, Dad, I'm going to row over to Lanton, and, if I can get the ARROW
fixed, 'I'll tow my rowboat back."

"Very well, then you won't be in any danger from Andy Foger. I must
speak to his father about him."

"No, dad, don't," exclaimed the young inventor quickly. "I can fight
my own battles with Andy. I don't fancy he will bother me again right
away."

Tom found it more of a task than he had anticipated to get the motor in
shape to run the ARROW back under her own power. The magneto was out
of order and the batteries needed renewing, while the spark coil had
short-circuited and took considerable time to adjust. But by using
some new dry cells, which Mr. Hastings gave him, and cutting out the
magneto, or small dynamo which produces the spark that exploded the
gasoline in the cylinders, Tom soon had a fine, "fat" hot spark from
the auxiliary ignition system. Then, adjusting the timer and throttle
on the engine and seeing that the gasoline tank was filled, the lad
started up his motor. Mr. Hastings helped him, but after a few turns
of the flywheel there were no explosions. Finally, after the
carburetor (which is the device where gasoline is mixed with air to
produce an explosive mixture) had been adjusted, the motor started off
as if it had intended to do so all the while and was only taking its
time about it.

"The machine doesn't run as smooth as it ought to," commented Mr.
Hastings. "No, it needs a thorou