"Look!" said the dwarf.
Kendrick did so—and there, spread below him, lay the floor of the desert. His camp, his apparatus, were just as he had left them.
Cor now moved toward the dial.
"Behold!" he said, pulling a lever.
Instantly the scene below was an inferno. Stricken by a blast of stupendous heat, the whole area went molten, lay quivering like a lake of lava in the crater of an active volcano.
"Suppose, my dear Professor," smiled the dwarf, strolling back from the dial, "just suppose, for instance, that instead of the lonely camp of an obscure scientist, your proud city of New York had been below there!"
endrick shuddered.
Well he knew now the terrible power, the appalling menace of this strange invader.