"
Undecided, Herzog smiled nervously. Even Flint had to laugh at his
indecision.
"All right, go on," said the Billionaire. "Only for God's sake, make it
brief!"
Herzog, thus adjured, cleared his throat and blinked uneasily.
"Oxygen," he said. "Yes, I can produce it quickly, easily and in large
quantities. As a gas, or as a liquid, which can be shipped to any
desired point and there transformed into gaseous form. Liquid air can
also be produced by this same machine, for refrigerating purposes. You
understand, of course, that when liquid air evaporates, it is only the
nitrogen that goes back into the atmosphere at 313 degrees below zero.
The residue is pure liquid oxygen. In other words, this apparatus will
make money as a liquid air plant, and furnish you oxygen as a
by-product.
"It will also turn out nitrogen, for fertilizing purposes. The income
from a full-sized machine, on this pattern, from all three sources,
should be very large indeed."
"Good," put in Waldron. "And liquid air, for example, would cost how
much to produce?"
"With power-cost at half a cent per H.
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