Evening Star Newspaper, October 30, 1930, Page 34

SOENTISTS STUDY CANERA YSTERY Silver Bromide Crystals Yield | e, to Research by Bureau. BY THOMAS R. HENRY. Some of the deeper mysteries of the behavior of the silver bromide crystal— whose peculiar properties are Tespon- sible for the phenomenon of photog- raphy—are yielding to research in the laboratories of the Bureau of Standards. | Only by unearthing the fundamental chemistry of the process, it is explained by Dr. B. H. Carroll, who is in charge of this phase of the work, can the full yudhmflrs of the camera be realized, and already some notable results have been olfintmd. Explains Fundamental Fact. The fundamental fact of photog- llp%, Carroll explained, is that grains of silver bromide, a crystalline sub- stance in which atoms of silver and of bromide are equal in number, are quite sensitive to different wave lengths of light. They are mixed in varying pro- portions with gelatirie, and the mixture forms the sensitive covering of the raphic plate. Light falling upon lver-bromide grains on the plate starts to release the silver atoms from the combination. This is responsible for the latent image, which is brought out in detail by chemical treatment of the plate with a developer. Now silver bromide, Carroll explains, while a highly light-sensitive material, is equaled or surpassed in. this respect by others; such as a mixture of hydro- gen and chlorine, which explodes as soon as a beam of sunlight strikes it. ‘The fact essential to its importance in photography is that the action of liber- :wllver atoms from the compound physics, especially the q eory of light, which holds that it strikes & surface in the form of dis- crete grucln of energy, some of which are absor! jhat for each quanta, or energy mfl:, of light absorbed by a silver crystal there is released from the molecular these consist of extremely minute particles of an impurity, silver sulphide, which forms in the gelatin and silver bromide mixture that the tly closed rooms, the aring only freshly laundered —— ‘Work has been started on a Federal road through the reservation at Carls- bad, N. Mex, ‘to shorten the distance to Carlsbad Caverns. THE EVENING STA SLAYER IS CONVICTED Detroiter Must Serve Ten Years for Tennessee Murder. TAZEWELL, Tenn., October 30 (#).— A jury yesterday convicted Allen Baylor, 32, of Detrolt, of sscond-degree murder for the slaying of Rufus Ball, 21, and fixed his punishment at 10 years in the penitentiary. Ball was the son of Houston Ball, | chief of police of Middlesboro, Ky., and was shot and killed at Cumberland Gap | on October 24, 1929. It was brought out in the testimony that the two men had been drinking and engaged in an argument. claimed he shot in self-defense. Better HERE is a handier package that”takes up less” shelf space. Fine, even-grained, free-run- ning salt and more of it than 5¢ ever bought be- fore. Ask yourgrocer for International Salt today, PLAIN or IODIZED INTERNATIONAL SALT, CO., INC. SCRANTON. PA. W s THIS NEW AND GREATER SALT VALUE IS PRESENTED TO YOU BY THE WORLDS LARGEST SALT PRODUCER. 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This ostonishing swing o Stude- baker is not confined o East nor West, but is nationwide. By this conquest of momealom, Studebaker has given you moloring sech as you never knew before. At any price above $1000 you owe yourself the thrifty hixury of Free Wheeling. Come, try il The World Champion The Warld Remous The New PRESIDENT COMMANDER DICTATOR $1850 10 $2600 $1588 10 $1785 $1095 10 $1250 S e A s R it AN prices of the factory LEE BUTLER, Inec. \ : 1132 Connecticut Avenue secret of their tender crispness. And that's why these i L3 delicious, flavorful squares are such favorites evérywhere. KRISPY CRACKERS FROM THE THOUSAND WINDOW BAKERIES of Loose-Wiles Biscuit Ce. YOU HAVE i | g il In this wax-wrapped package « o+ In family caddies and by i g I fii 4 :;%%5? Columbia 5050 Py (Opporite Mayflower Hotel) Delicions for \\\\\H\\ ICHES DN Bother You? Pleasant Tasting Salts Purify Blood Stream— Make You Feel Like Yourself Again Studebeker Sponsored 3 Butler, Inc., Every Wed- nesday Evening at 7:15 er W. Service Station, co Station, 1628 L Quict in second gear. Has great power and several of my friends say it rides better than much higher priced cars.” oms’ Auto Service LREE operation, pick-up, speed when Free Wheeling, and its other fine features too numer- ©ous tomention.” GOT TO DECIDE! and the risk is ours: OU have got to decide between the old, tedious way of making hot biscuits and this new product that needs only milk added to make those good old-fashioned hot bis- cuits, like grandma’s! ‘ No mixing, no measuring, no un- certainty, no guessing. Quiko, the new biscuit mixture, contains évery. thing all ready mixed. Just the right proportion of the best quality baking powder, flour, shortening, salt. Not just a self-rising flour but a complete biscuit preparition. Simply add milk, stir and bake in a hot oven. Get a package of Quiko. See how easily, quickly and convenient- ly you can make light, crisp and flaky hot biscuits. Then decide! A 15¢ package makes 6 to 14 bis- cuits. Delicious for shortcakes, too. You can get Quiko today from prae- tically any grocer in Washington. #Absolutely Guaranteed Quiko is fully gugranteed. Your grocer will o Products Corp., New Brunswick, N. J. of Famous FLAKO Prepared P::Cnn refund your money if the quality of Quiko qu I .o" ‘ a biscuits is not entirely satisfactory. al L ; ly actory. i"”’ h..,\ 3 0 - 1 L