"I think of making a trip this morning," said Rob, carelessly.

"Where to?"

"Oh, I may go to Boston, or take a run over to Cuba or Jamaica,"
replied the boy.

"But you can not go so far by yourself," declared his father; "and
there is no one to go with you, just now. Nor can I spare the money
at present for so expensive a trip."

"Oh, it won't cost anything," replied Rob, with a smile.

Mr. Joslyn looked upon him gravely and sighed. Mrs. Joslyn bent over
her son with tears in her eyes and said:

"This electrical nonsense has affected your mind, dear. You must
promise me to keep away from that horrid workshop for a time."

"I won't enter it for a week," he answered. "But you needn't worry
about me. I haven't been experimenting with electricity all this time
for nothing, I can tell you. As for my health, I'm as well and strong
as any boy need be, and there's nothing wrong with my head, either.
Common folks always think great men are crazy, but Edison and Tesla
and I don't pay any attention to that. We've got our discoveries to
look after. Now, as I said, I'm going for a little trip in the
interests of science. I may be back to-night, or I may be gone
several days. Anyhow, I'll be back in a week, and you mustn't worry
about me a single minute."