On top of the square iron buckets was coiled eight or ten feet of
rubber hose. Taking it out Ned closed and locked the lid. He then
screwed one end of the hose onto the open spout and, springing to
the top of the case, passed the other end out of the open
ventilator.
"Now," Ned explained, "we are in less danger. Difficult as it is to
condense hydrogen, it is more difficult to keep it in liquid form.
It constantly seeks to return to gas. In a closed place it might
make trouble."
Elmer had already disappeared, with popping eyes and mumbles of
protest. Alan proudly exhibited to his friend the results of his
share of the work of preparation. Every crate, box, barrel and
package was numbered and labeled and securely fastened in place.
On one side of the car stood five large oak tanks, looking like the
famous beer tuns of Germany.
"I can make more hydrogen in those than you've got in your black
box," Alan exclaimed jokingly.
"I'll have a better look at them in the daylight," finally said Ned;
"and now those easy chairs in the other car would feel pretty good.
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