He made a glass tube thirty feet long, and sealed his grid, his plates and his lead-wires into one end, closing that end off hermetically. Then he fashioned a piston of waterproof cloth fiber so as to fit into the closed end, almost touching these elements and yet free to move away from them without tearing them. Then he filled the tube with water, and inverted it. But the water did not drop away to a height of about twenty-eight feet, as it would have done on Earth. Of course not, for this was Venus—Venus of an atmospheric pressure practically equal to that of earth, holding the water up; and yet with a gravity much less than that of Earth, tending to pull, the water down! But, by lengthning the pipe sufficiently, Cabot finally got the proper balance, the fiber piston was pulled down, and a partial vacuum, practically free of water-vapor had been created. He then sealed off the upper portion of the glass tube with his blow-torch, and had his radio triad. For these radio tubes, the glass was made according to a special formula. Of this same glass, Cabot fashioned lenses for the goggles which he and Doggo planned to wear on their trip home across the boiling seas. One of the constituents of this special glass is lead monoxide, commonly known as litharge. This gave the Radio Man some concern, until Doggo suggested melting lead in a rotating cylindrical iron drum with spiral ribs. By pumping cold air in one end of this drum, fine particles of litharge were driven out through the other, where they accumulated in a stationary container. About this time the king and Jud began clamoring for results, so Cabot made a few electric lights with platinum filaments. And entirely apart from pacifying his two patrons it was well that he did this, for the speedy burning out of these lights showed him that he had a new problem to face, namely: the elimination of all traces of oxygen in his tubes. He got rid of considerable by placing tubes in a strong magnetic field while exhausting, but this was not quite enough. It looked as though his experiments would have to end at this point; for with an immense quantity of alcohol completed, and with pyrex glass for their goggles, everything was all set for the conspirators to locate Doggo’s hidden plane and fly across the boiling seas to Cupia. The Vairkings were by now sufficiently used to the huge ant-man and to his participation in Cabot’s scientific experiments, so that no objection would be raised to his accompanying the radio man on one of the latter’s expeditions in search of certain minerals which he believed could be found in the country.