Captive of the Green Barbarians!
Newest of mechanical monsters intended for under-sea exploration is the tractor-sphere being designed by Otis Barton, builder of the bathysphere used by Dr. William Beebe in setting a new world’s diving record of 3028 feet.
The new invention, intended to be driven into the sea from the beach level under its own power, might be classed as a bathysphere mounted on caterpillar treads. Powerful electric motors operating from sealed-in storage batteries would move this undersea tractor over the rocky slopes and pinnacles of the ocean floor.
Earth Lay Helpless Before This Cosmic Killer!via