explained with a wink.

"It sounds funny, and yet, I can't help feeling there's something to it,"
Hal remarked.

"Well," said Cub, bringing his feet down from the table with enough noise
to rivet a conclusion; "you may call it addition, or subtraction, or
multiplication, or division, or algebra, or geometry, or trigonometry, or
calculus--does that complete the list?--I'm going to make my imagination
leap across the spark gap; so here goes."

He snapped the aerial switch into sending, began to "jiggle" the
key alphabetically, and the spark leaped with successive spits
across the gap.

"Cub's got his goat back," Hal remarked with a knowing look at Bud.

The latter grinned and nodded his concurrence.




CHAPTER VIII

Mathematics or Geography?


But the morning proved to be a poor time for communication by radio for
two reasons. First, the atmosphere was warm, a poor condition for the
transmission of ether waves, and after all, night time is the ideal