They're working on it, over there, to obtain cheap and plentiful
fertilizer from the air. Nitrogen _can_ be obtained from the air, even
now, and made into fertilizers even cheaper than the Chili saltpeter.
Oxygen is liberated as a by-product, and--"
"Oh, it is, eh? And could it be saved? In liquid form for instance?"
"I think so, sir. The Siemens & Halske interests, in Germany, are doing
it already, on a limited scale. In Norway and Austria, nitrogen has been
manufactured from air, for some years."
"On a paying, commercial basis?" demanded Flint, while Waldron, now a
trifle less scornful, seemed to listen with more interest as his eyes
rested on the rotund form of the scientist.
"Yes, sir, quite so," answered Herzog. "It's commercially feasible,
though not a very profitable business at best. The gas is utilized in
chemical combination with a substantial base, and--"
"No matter about that, just yet," interrupted Flint. "We can have
details later. Do you know of any such business as yet, in the United
States?"
"Well, sir, there's a plant building at Great Falls, South Carolina, for
the purpose.
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