"And liquid air, for example, would cost how much to produce ?" "With power-cost at half a cent per H.P.hour, about $2.50 a ton.

The oxygen by-product alone will more than pay for that, in purifying and cooling buildings, or used to promote combustion in locomotives and other steam engines.

The liquid air itself can be used as a motive power for a certain type of expansion engine, or--" "There, there, that's enough!" interposed Flint, brusquely.

"We don't need any of your advice or suggestions, Herzog.

As far as the disposal of the product is concerned, we can take care of that.