Air Wonder Stories, May 1930 — page 93: what you’re looking at

Machine-transcribed from the original scan — historical spelling and the odd misread are preserved.

> _ : . _ G : The story you have been waiting for — THE — ELECTRICAL MAN By Neil R. Jones A tale of scientific adventure and crimino-detective action — fast moving — drama — suspense — and swift adventure. A real “ac- tion” story with a fighting motive. Read it in the May issue of SCIENTIFIC DETECTIVE MONTHLY. — On All Newsstands Th OTHER CONTENTS OF THIS ISSUE MURDER IN THE CLINIC By Edmond Hamilton THE AZURE RING By Arthur B. Reeve THE ELEVENTH HOUR By Edwin Palmer and i Wm. B. MacHarg SPECIAL OFFER! h, Newt 8 “for #128 MAIL COUPON — TODAY! SERB ESE SSE BES SESE SCIENTIFIC DETECTIVE MONTHLY, 98 Park Place, New York, N. Yo AW55 Enclosed find ONE DOLLAR for which enter “M subscription to SCIENTIFIC DETECTIVE MONTHLY for the next eight months, (Canada and foreign $1.25.) NG@Me cevesccccceccscssresevarcarsevcnesusosecnutcvess Addre89 vecerecevessenscnsvessicrarcssvncesenonsansee City sve cece rsqcecepssgevescdeercces Stats acinsxtens AIR WONDER STORIES THE READER AIRS HIS VIEWS (Continued from page 1050) set magnify it into another sending set and so on, und finally getting: a close up Few? Better yet, some one could rig up some kind of a ‘coil to sanity Hight waves, (I'm-apply- ing for the ‘‘Professor’s job” on Collier’s Hour.) sent in-an idea-to the-Goodyear Zeppelin Co, a few months before it appeared in Arr Wonoxn Stowe It concerned-an Air-tunnel through the centes of an airship to. make it more stable and more speedy. I thought it. would make a partial vacuum in front of the airship, But they kindly rejected it, “Can zou beat it. (1 had not Inown you had published that same idea before.) Redding your publication sure fills one's mind with ideas, to'have a slogan for it like “An Idea on very Page.” Yours sincerely, BOYD J. HESS, 7445 Schoyer Ave, Swissvale, Pa, (As. explained in our February issue, in answer to Mr. Bede, a television image is com- posed of impulses which may be miignified ¢leo- trically;- but their number ‘may not be- added to m order. to bring out more details. The game would’ be found-trie of the images re- ceived by our eyes, if thera were any way to amplify them; ny are Jacking: in cebu soow, a certain point, If we put a white spec on o dark- background, and back away until we can no longer sec -it, we find-a point where the light reflected from it is not enough to \produce an-effcct upon our eyes, though they still re- ocive it, Only a Jens or.other optical apparatus, which picks up more light than our eyes can, will make the speck again visible ot this dis- tance, No matter how Inrge a train of Jenses we use, there isa) natural limit to magnifying power; due to the fact that a wave of light'is about 1-50,000 of an inch in length, and an ob- ject pales ey than this ete sone iy affecting the t-wave percep! s ight which we can see is Iimted to a very narrow range of wayelengths, probubly determined by the size of the molecules in the sensitive back- und (the retina) of our eyes, which it af- ‘ect chi ly, Theoretically, this light wave is a radio wave, only a very short onc—about one two-millionth of a meter Jong. As the wavelength to which radio “apparatus will respond is determined by its size, we Ieave to Mr. Heag the problem’ of winding- a ooil of the size suitable for tuning tn the wavelength of light.—-Editor.) BOOK REVIEWS AVIATION MECHANICS, by H. Win- field Secor. 96: pages, illustrated, varn- ished paper cover, size 834” by 1134”. Published by Popular Book Corpora- tion, New York: City. Price, $.50. Awiation Mechanics bas been intended pri- marily as a‘handbook for amateur aviators and comitructors of “planes and: Siders. “The man who is. desirous °of building his own -ship will find this book -an indispensable aid. ‘All. aero- nautical terms used are described fully and each part of the plana ia covered adequately in text and> illustrations, 50 that the Jay man. is enabled. to proceed without difficulty. There is an -abundance of diagrams und- photographs, visualizing each step in the procedure of build- ing an- airplane or glider, Several types. of ships are covered: a jman-carrying glider, a Bingle passenger monoplane, a single passenger sport biplane: are among them, A pit must know. his oe %o the author has devoted a_ chapted> to vmodern aircraft engine, with: illustrations showing the internal construction and) how the various parts. func- tion, “Practical Construction Hints” is. the title of another chapter; it contains some choice bits-of information which every builder will wel- come. Nor; do’we overlook the interesting de- partment, pabareely illustrated, showing. all the. latent ty; of airplanen and dirigibles, ‘gliders: and balloons. . This book isa real how- to:male-it? book; it tells and illustrates each step in building an airplane for your own use. The designa given are standard ones and the planes. described have actually been built, and successfully flown, se In short, as you must have concluded by now, that we are very enthusiastic about this new book which does well what it set out to do —to tell the reader how to actually build and fly a plane or glider, S END your -name and address for an amazing FREE book which gives facts that will surprise you: about Modern Pho- tography. It tells of an-amazingly easy wa to start your own business quickly, wit very little capital. 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