The slightest response, the tiniest of sparks from those sensitized silver globes, and Hobgood would be on the road to vindication, provided the skeptics would accept the verdict of Hayne's dynamograph.

The spacecraft was equipped with a mechanical soil-measuring penetrometer, a dynamograph, and a radiation densitometer for obtaining data on the mechanical and physical properties and the cosmic ray reflectivity of the lunar surface.

"The subject will approach the dynamograph with both his hands extended -" Hayne meant Hobgood, not the cloaked being in black who had entered by the main door, to close it silently behind him the moment the red light replaced the other illumination.