“To hell with that argument,” said Mr. Merkle, interrupting him, though without sign of resentment. “I ain’t never double-crossed a friend yet. If you couldn’t believe it shut up before you start.”

Feeling that he had to be satisfied with that, the secretary went ahead and recounted briefly the whole story of Jimmy’s idea. Only he did not mention Jimmy—but set it forth as his own.

The chemist listened attentively, with his eyes fixed on his companion’s feet.

“Well, go on, Ike, what about it?” said the secretary impatiently, after a moment. “I’ve been thinking about it quite a while. Is it any good?”

“You could do it,” said Mr. Merkle with deliberation.

“How?” The secretary’s eyes sparkled, but without waiting for his question to be answered he went on to name all the objections he had pointed out to Jimmy.

“You ask me could it be done and right away you tell me why you couldn’t do it,” said Mr. Merkle.

“Well, all right, then. How?”

“All what you say about piping up heat is bunk,” the chemist declared. “You couldn’t make a fire four hundred feet in the ground and melt glass with it so far away. Bunk. But listen, Leff, here is it what you could do—in the ground you start a fire—”

“How could you control it?”