Evening Star Newspaper, September 11, 1930, Page 5

MARGONI DOUBTS RADID WAVE LI Believes They Reach Millions! of Miles Beyond “Heaviside” | Layer of Atmosphere. By the Assoclated Press. TRENTO, Italy, September 11.—The Marchese Guglielmo Marconi, inventor of wireless telegraphy, in the inaugural address at the second meeting of the Italian Society for Advancement of | Science today, expressed belief that | radio waves may travel long distances, even millions of miles beyond the | earth's atmospheric layer. He id he did not see any re: some sclentists maintajn, waves on the earth should not travel such a distance, since light and heat | waves reach us from the sun, penetra- ting the atmospheric layer. He referred to the observations of such scientists as Stormer and Federsen, and commented that the former elec- trified particles derived from the sun and under the magnetic influence of the earth which acted as a reflector of electric waves from the earth after they had passed the so-called Heaviside and Kenelly layer. Reflecting Layers Exist. “The existence of various reflecting Iayers,” he said, “is the best hypothesis on which to base an explanation qf long distance wave transmission which over- comes the curve of the earth. Layers capable of reflecting electric waves exist at heights varying with the hour of the day and the season of the year. These layers also are influenced by the effects of light, by electric and magnetic activ- ity of the sun, and by other causes yet unknown. “The influence of these layers on the propagation of electric waves explains the variations observed in the waves intensity and traveling distance accord- ingly as they travel through the illumi- nated or dark zones. This again would point to the capital importance of the season and of the hour for determining what waves are most suited to radio transmissions. “Radio engineers should therefore keep in touch with the work of meteor- ologists and astronomers, but it is equally useful for the latter to keep in touch with the former, owing to the powerful means which modern develop- ments have placed at the disposal of radio stations.” Angle of Transmission Important. Marconi sald that because of these reflecting layers the angle of transmis- sion in respect to the surface of the earth is of great importance. He hinted at the possibility of electric ex- ploration of space. ,Speaking of the new under-10-meter short wave radio stations, operating between Italy and Sardinia, he said .that these . waves would seem to be reflected and con- tained in space between the surface of the earth and a layer much lower than the heaviside layer, while other observations made with short waves above 10 meters would seem to show that these waves are not confined to a limited space near the earth. The inventor analyzed the progress in radio communication obtained by means of short waves and the beam TAE EVENING STAR, WASHINGTON, D. C, THURSDAY, SEPTEMBER 11, 1930. system, and he pointed out that quali- ties of short waves have been studied and demonstrated by him since 1915. Owing to the usefulness of these waves, he said, powerful organizations, world's cables, had been obliged to come to_terms with the Marconi Co. He related how radio waves often chose the langer route rather than the nearest distance between the commu- nicating stations and he referred to a paper read by him on this subject to New York in 1922, adding that this phenomen is already fully exploited in radio transmission. He said wireless echoes were among the most fascinating of phenomena, capable of disclosing the most useful facts. He divided echoes into classes according as they indicate that elec- tric waves have covered distances be- fore returning to us in the form of echoes shorter or longer than the cir- cumference of the earth. Girl Youngest Aviator. Miss Winifred Jess Drinkwater of Paisley, Scotland, is Britain's youngest aviator, having just received her pilot’s license at 17, the minimum age for a | British pilot. In fying solo she han- dles her machine like an expert. S. Baldwin, secretary of the Scottish Fly- The Susquehanna 1430 W Street N.W. 3 Rooms, Kitchen and Bath, $40 PROTECTION OF LABOR IN MEXICO IS URGED Attorney Tells Chamber of Commerce Session Forming of Body Necessary. owning more than 50 per cent of the|q; By the Associated Press. MEXICO CITY, September 11. — the Institute of Radio Engineers in!|mjjary Branch, attorney and Tepre- | precced ‘the belief that probably not sentative of the Huasteca oil interests | one industrial development in Mexico here, last night told t! ational Con- | had paid a dividend in five ye: Nucoa SPECIAL ing School, says she will be & great flyer. P federation of Industrial Chambers of Commerce, the opening of their con- | vention, tI the formation of a joint | i | body for the protection of all who em- ploy labor in Mexico was essential to | |i rosperity of the country. the Industrial | "5 P20 hat ‘while there was admit- tedly a necessity to protect labor, it was equally necessary to give employers complete direction over their factories and offices. Employers, he said, must be allowed to select their own employes |and readjust their personnel whenever | necessary without molestation. He ex- The Hecht Co.--Men’s Hat Shop--Main Floor | Fountain Brand Hams | Libby's Sliced Pineapple | Ritter's Spaghetti | P AND G Soap | Schindler’s Peanut Butter | | Pickles; Lang’s Sweet Mixed, Dill or Sour Qt. Jor 256 | Gold Bag COFFEE Good With Every Mlul Lb. z9e Morton Salt Plals or lodized 2 . 15c¢ Paramount |Certo ..cuiw.a™ 29¢ Wilkins Coffee...™ 35¢| Abers Al Excent in Price | Papg.Wax ......"* 10¢ Orienta Coffee. .™ 39¢ g;% — fl: Jar Rubbers.....™* Tc | 0-Kay Coffee. ..." 25c|m== _ Pickles % 23c|Jar Tops. m.ne o™ 25¢ Prime Rib Roast — T HORMEL’S ,5%pave CHICKEN ™ 55¢ CHUCK ROAST ..........."™ 25¢ THREE-CORNER ROAST... ....™ 33c American Beau CROAKERS ...-.v.consers SLICED BACON.........Ib. 3*7¢ | FANCY TROUT -eommmmermcsces. ™ 40 FATHOM Fillet of o B, 250 STAR SPECIALS 2 45 29¢ 3 Cans 28 10 Cekes 376 | 16-0z. Jar 2 1€ | Puritan Malt Syrup Can 45e | TRE-RIPE PEACHES.-.z.:,:.Vu an 18 p.Goe—trie | DRO. GRAPEFRUIT... ..........™ 25 JAM | SUNSWEET PRUNES. ......™ ™= 15¢ - 25¢ | DEL MONTE PRUNES. . .™* == 18c Maine CAMPBELL’S BEANS. .....3 = 25¢ v DEL MONTE SPINACH. CORN SUCCOTASH ...\ Can (4 15 FOREST KING PEAS. . cwmrn™ Black Bird Grape—Apple Pure Fruit Juice Syrup Bottle 25¢€ Ayrshire Butter Lb. Gold Band Butter Lb. 4%7e¢ Pillsbury’s Flour § Lbs. 27¢; 12 Lbs. 53c| Washington Flour 12 L. 46¢; 24 L. 89¢ Ceresota Flour § Lbs. 27¢; 12 Lbs. §3e¢ | Gundersheimer’s = Cake .°5i5.. b 37¢ | Rock Creek Ginger Ale 3 'miuir 25e | Dutch Brew 4 &=, 25¢ FLY-TOX MY-T-FINE Chocolate Dessert or Lemon Pie Filling 3 P 23 Knox Gelatine Pie. 19¢ Quaker Crackels P*s- 121¢ Hominy Grits Ps. 10c MACARONI, SPAGHETTI Homse Ammonia 2 Botis. 25¢ ol Quaker Oats P 11c Flako Pie Crust P& 14c Iron Cld Clothes Pins | 3 Phse. 2§e | 5" et SUPERIOR Swans Down z Flgs: lse Doughnuts Doz. 30c | Cake Flour Lee Pks. 29c Brewer-Snyder’s Kills Flies, Mosquitoes, Etec. Horse Radish Potato Chips Lge. . St e (SRS GoldDust ' P 25¢ SALADA TEA e cmgge | Valb. Phe. 23¢ Sani-Flush Can 22¢ KRUMM’S FRESH FRUITS AND VEGETABLES F. ;:cy Fresh Fancy N. Y. .. Prunes Pears Apples 3 . 25¢ (4 1. 25¢ 3 COOKING APPLES WHITE POTATOES 10 ™= 33¢ ICEBERG LETTUCE ™= 10c; 15c¢ NEW CABBAGE ™ Sc YELLOW ONIONS 4™ 17c Stringless 5 ™= 25¢ Pounds 25¢