be no trial. Their small but business- like-looking electric
range was therefore soon in full blast, with Bearwarden in
command. It had enough current to provide heat for cooking for
four hundred hours, which was an ample margin, and it had this
advantage, that, no matter how much it was used, it could not
exhaust the air as any other form of heat would.

There were also a number of sixteen-candle-power incandescent
lamps, so that when passing through the shadow of a planet, or at
night after their arrival on Jupiter, their car would be brightly
illuminated. They had also a good search-light for examining the
dark side of a satellite, or exploring the spaces in Saturn's
rings. Having lunched sumptuously on canned chicken soup, beef
a la jardiniere, and pheasant that had been sent them by some of
their admirers that morning, they put the bones and the glass can
that had contained the soup into the double-doored partition or
vestibule, placing a large sheet of cardboard to act as a wad
between the scraps and the outside door. By pressing a button
they unfastened the outside door, and the articles to be disposed
of were shot off by the expansion of the air between the
cardboard disk and the inside door; after which the outside door
was drawn back to its place by a current sent through a magnet,
but little power being required to reclose it with no resisting
atmospheric pressure. As the electricity ran along a wire
passing through a hermetically sealed opening in the floor, there
was no way by which more air than that in the vestibule could
escape; and as the somewhat flat space between the doors
contained less than one cubic foot, the air- pressure inside the
Callisto could not be materially lessened by a few openings.