vaguely underneath.

"Something wrong with the spark."

"Bless me! Can you fix it?"

"I think so. Now, if you will be good enough to turn that crank."

"With pleasure. What an extraordinary piece of mechanism.--"

"A little faster."

"The momentum--"

"A little faster."

"Very heavy fly-wheel--"

"Just a little faster."

"Friction--mechanics--overcome--"

"Now as hard as you can, Professor."

"Exercise, muscle, but hard work. The spark,--is it there? Whew!"
and the Professor stopped, exhausted.

It was the repetition of those experiences that sobered the
Professor and led him to speak of his work at home, which he
feared he was neglecting. At the last stop he stood in a pool of