The October Issue of The Popular Science Monthly
What the War Has Done Harnessing the Sun
For the Aeroplane in Egypt
The hiitlk'field is to the aero- The sua is hot. Every boy iiautie engineer a huge hiboratory knows that who lias ever used a for the testing of aeroplanes. More burning glass. Isn't there some progress has been made in design- way of heating water with the ing flving machines since the war began than most of us imagine. Wouldn't you like to know just what the war has done to bring v.s measurably nearer the day when about the wonderful \)\nn of a we will trundle out a flying ma- Philadelphia inventor to harness chine as easily as if it w^ere an the sun. automobile and whirr away from our country homes to our offices? The October issue will tell you.
HandHng New York City's Traffic in a New Way
��sun and driving a steam engine — some way of putting the sua to work? The PopuLAit Science Monthly for October will tell all
��Motoring on Roller-Skates From Home to Office
It sounds fantastic, but inventors have been so successful in motoriz- ing the roller-skate that before long New York, the greatest city of it will l)e possible to skate your the Western Hemisphere, is a way to work each morning. Read little, long island, packed with about it in the October issue.
��people, trolley cars, wagons, dwell- ings and office buildings. It has the most difficult traffic problem in the world. To handle the millions and millions of tons of
��In the same issue and regularly thereafter you are to be informed of the latest happenings in the great field of astronomy.
These are only a few of the
��freight brought in by steamships articles which are to appear. Re-
��and railways, a crude and anti- (juated system is still in vogue. In the next issue of the Poptlar Science ^Monthly we will tell how great engineers propose to solve this traffic problem scien- tifically.
��member that each month there are three hundred articles and as many pictures — all intensely in- teresting, all dealing with new things in science and invention which you ought to know to keep abreast of these stirring times.
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