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Show THE INVISIBLE. H Ten million letters were carried by H the air mall in the last three months. H That's at the rate of 40.000.GOu letters H year. H The cost of carrying a ton of mall H oy flying machine averaged $8 a mile H n 1920. It was cur to $6 a mile in H 1321 The rost anon will h down to $2.60 a mile, duo to improved air-I air-I planes now being put In use. The postofflce, which started the air mall service as an fxperlment In May. 1918. is the first to prove the commercial commer-cial value of the flying machine. It requires no stretching of the imagination im-agination to picture sJ mail being carried car-ried by the air route That may come within five vears Here is a prediction- In a few years mall will be carried hy invisible postmen. I Btters and parcels will he. loaded Into airplanes controlled by wireless. The airplanes, with nobody aboard, will rise into the air at, say. New York fly like an arrow and land In San Francisco, operated and steered by wireless Important experiments along this line have fusl been successfully com-pleted com-pleted in France. Wireless-controlled airplanes, without crews, were kept in the all for an hour and navigated iabotu as easily as if a pilot were , aboard. The wireless-controlh'd airplane shows how man is conquering the in visible. It is millions of times more wonderful than the Hindu fakir's trick of moving small objects without touch in? them M the fakir puts It. power of mind over matter. The wireless is man's most uncan ny invention. It may also develop Into his most important. Many now living may see the day when the sky will be dotted with swarms of crewless airplanes, con trolled by wireless and getting their mothe power by wireless, carrying mail, express, passengers and even freight. We are on the threshold of an age which will be almost supernatural In iis wonders The whole form of clvill ration, including all ways of doing things, will soon be transformed by the magicians of science. |