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Just then, however, she came across a paragraph in a German newspaper in Munich which said that a great scientific man in Berlin had completed an air-motor at last, after years of study, and that it worked tolerably, enough to demonstrate the principle, but could never be of any practical use because the chemical product on which it ultimately depended was so enormously expensive. Now Mrs.

The object of music is to make a cheerful noise, which can be done very well without pencil and paper and the rules of harmony. But Overholt could neither make a cheerful noise, nor draw a holly leaf, nor speak French, nor even understand a pass-book, though he had invented an Air-Motor which would not work, but was a clear evidence of genius.

The two were before the Air-Motor, turning their backs to the door; and they heard it open quietly, for old Barbara always came to call Overholt to his meals, because he was very apt to forget them. "We are just coming," he said, without turning round.

Overholt's instrument took its place in every laboratory in the world; but the mechanic's labour-saving utensil took its place in every house. It was on the strength of the valuable tool of science that Mr. Burnside had invested two thousand dollars in the Air-Motor without really having the smallest idea whether it was to be a machine that would move the air, or was to be moved by it.

He had everything littered together in two battered deal candle-boxes, including the broken soup-plate containing the flour paste, a loathely, mouldering little mess that diffused a nauseous odour, distinctly perceptible through that of the unpronounceable chemical on which the Air-Motor was to depend for its existence.

Burnside called it borrowing money. Overholt was sure that if he could raise more funds, not much more, he could make a success of the "Air-Motor"; Mr. Burnside was equally sure that nothing would ever come of it. They had been explaining their respective points of view to each other, and in sheer absence of mind Overholt had forgotten to shake hands. Mr.

So the two slept in their chairs under the big bright lamps; and while they rested the Air-Motor worked silently, hour after hour, and the heavy wheel whirled steadily on its axle, and only its soft and drowsy humming was heard in the still air. That was the most refreshing sleep Overholt remembered for a long time.

A rickety cottage on an abandoned Connecticut farm that is waiting for a Bohemian emigrant to make it pay is not a gay place, especially when two-thirds of the house has been turned into a workshop that smells everlastingly of smith's coal, brass filings, and a nauseous chemical which seemed to be necessary to the life of the Air-Motor, and when the rest of the house is furnished in a style that would make a condemned cell look attractive by contrast.

One thousand more, clear of living expenses, would do it. He was positively sure that it would be enough, and he and the boy could live on his little cash balance, by great economy, for four months, at the end of which time the Air-Motor would be perfected. But without the thousand the end of the four months would be the end of everything that was worth while in life.

"And then you turn a valve?" "Exactly, and the air-motor turns over the dynamo which starts generating electricity right away." "Then, except for the first cost of the car, the expense of operating it is comparatively nothing?" asked Dick. "Yes, you might say we get our power out of the air, and that's free so far."