Evening Star Newspaper, December 4, 1930, Page 7

TRADE BOARD SEES SCIENCE'S MARVELS 2,000 Members and Guests Enthralled by Exhibitions at Meeting. A modern’ Aladdin rubbed ‘his lamp and for more than two hours last night 2,000 members and guests of the Board of Trade sat amazed as they witnessed at first hand' demonstrations of many | of the scientific “miracles” that are coming to play part in every-day affairs. Sergius P. Grace, assistant vice presi- dent of the Bell Telephone Laboratories of New York, guest speaker of the December meeting of the board, which acked a capacity crowd into the large 1 room of the Willard Hotel, in a sense took his audience “back stage” in & modern research laboratory to show them the wonders that man has pro- duced. While some of the demonstrations have been witnessed in piecemeal fash- don or described before here, it was the first time so great an array of the marvels of modern communication have been given a public showing in Wash- ington. Marvels Are Commonplace. ‘The Washingtonian, sometimes called blase because of the many unusual events that are a part of the life of the National Capital, sat well nigh en- thralled as a carbon flame gave voice to music, when the sound of the beating of a human heart resounded through the auditorium, when a mysterious ma- chine caught up a sentence of simple speech, rebroadcast it as an unrecog- nizable scramble of sound and later re- peated it in its natural form, and when & telephone number, dialed on an ordi- nary dial phone in the room, was al- most instantly transformed into a hu- man-like voice by a mechanical instru- ment in New York and relayed back to the Willard ball room and broadcast there through amplifiers. Referring to the many scientific de- ‘welopments that have been accomplished during the past few years, Mr. Grace predicted that modern scientists would continue to explore the unknown laws of nature and produce more and more discoveries that would work to the benefit of the race, but never would be able to fathom the fundamental mys- teries of time, space, matter, force or life itself. Trifles With Mysteries. As the scientist took his place on the speakers’ platform among an array of amplifying machines, mysterious look- ing apparatus, vacuum tubes and the like, the public address amplifiers ordi- narily used in such meetings were re- moved from the stage. Yet when he spoke the voice carried to the far reaches of the room without effort. No microphone was visible, yet his voice was relayed from giant loud speaker horns hung from the ceiling of the suditorium. As he lightly tapped the pocket of his coat a resounding thumping noise fell upon the ears of his audience. To explain this mystery, Mr. Grace took from his pocket a small instrument, which he explained as a miniature transmitter, about the size of a silver quarter. This, he said, picked up the Jow tones from vibrations of his chest and the higher tones from the sound waves of his voice, the speech being relayed to the large amplifiers hung in the hall. Mr. Grace demonstrated how modern scientists, by making proper combina- tions of materials, properly magnetized, could “defy the law of gravity.” He held up a small bar of metal, super- imposed it over a small wooden box and when it released the metal piece, it hung suspended in air, bouncing slightly up and down when he touched it with a finger. ‘This phenomenon, he explained, was caused ‘magnetic repulsion forces in the metal plece and in a second, similar metal bar incased in the wooden box. This plays a part now in all dial telephones in magnetized portions of the sets operated by telephone users. Another new mechanical device, the automaton that transcribes the me- chanical impulses set up by the custom- ary use of a dial te!eghone into human- Jike speech, during the next year will be employed in the office of the Chesa- & Potomac Telephone Co. here, . Grace announced. Auttomaton Does JYob. ‘To demonstrate this device, Mr. Grace picked up a telephone, connected with & translation apparatus in New York, dialed a number and in a moment the machine in Gotham was “speaking” the numerals into a long distance telephone connected with amplifiers in the ball Toom here. ‘This apparatus, he explained, was de- | signed primarily for “tandem” tele- | phone offices, where dial connections may be completed over rather long cir- | cuits. By the use of such a “call an- nouncer,” the telphone operator, in- stead of remaining on the line until the distant operator answers and then re- peating the number to her, records or dials the number on a set of keys and then continues to handle other calls. Meanwhile when the operator at the other end of the line is ready to re- celve the call and make the local con- nection, she merely presses ment key and the automaton “speaks” the numbers to her. One of the most spectacular of the demonstrations was the broadcasting of instrumental and voice music from a flame. As Mr. Grace and a mechani- clan made music come from a blazing arc between two pieces of carbon, the @Quests scientist referred to the Biblical | pree account of the voice that spoke to Moses from the burning bush. This develop- ment had its base in experiments by Alexander Graham Bell in 1875 in transmitting speech over a beam of light. Speech Is Scrambled. ‘The stunt of “scrambling” speech and then having one of the mysterious machines “unscramble” it proved one of the most sensational demonstrations. Mr. Grace spoke a simple sentence into a transmitter connected with the ap- paratus as the audience listened. This same sentence was given back to the audience a moment later as a jargon of sounds as unintelligible as Greek would be to a Norwegian. Then the process was reversed and the plain American words again were heard. This was accomplished by “inverting” the speech by reversing the frequencies or tones and: turned again “right side up” by the use of modulators, demodu- laters and filters, he explained. ‘The value of the discovery and in- vention, he said, was in obtaining se- crecy in radio communication, yet en- abling the recipient of such messages, after they had been again turned into natural form at the receiving station, to understand what was originally broadcast. George Plitt, president of the Board ‘Trad de nd Lloyd B. Wilson, OAL Our low prices are for cash delivery only. W. A. Egg..$14.60 W. A. Stove, $15.30 W. A. Nut..$14.75 W. A, Pea...$10.40 Buckwheat.. $8.10 Coke ... Fairmont Egg $8.25 New River Egg, $11.60 Also firepiace and Kindling _wood. ~ All our s are screened amd weight guaranteed. B. J. WERNER 1937 Fifth St. NE. North 0079 Invest Your Xmas Savings In Future Happiness Use it, or a part of it, as an initial deposit in a fund for a home. Then, by regular de- posits and earning interest at 5%, you will accumulate suf- ficient for the down pay- mlgd\]l. A&vfi:eu point we !;‘l.“ gladly a you regarding investments. o Sat NATIONAL PERMANENT BUILDING ASSOCIATION UNDER SUPERVISION OF THE U 5 TREASURY 949 9th Strcet. N. WE PAY o/- ON SAVINGS [ BV usT stLow “Y. AVE The Management of This Bank is in the hands of experi- enced whom officers, some of have been con- nected with us since 1890. THE EVENING president of the Chesapeake & Poto- mac Telephone Co., gave an introduc- tory talk. Odell S. Smith, chairman, of the Public Order Committee of the trade body, presented a RE:H. uphold- ing the efficiency of the Police and Fire Departments, and Fred A. Smith -an- nounced plans for the annual Midwin- ter dinner meeting on February 7. Prior to the meeting special guests of the board were given a dinner by officials of the Board of Trade. Listed as honor guests at the meeting were A, B. Barbour, Norman Baxter, George Rothwell Brown, George K. Burgess, P. O. Coffin, Gen. Herbert Crosby, F. Trubee Davi- son, Frederic A. Delano. Walter Ellis, Robert V. Fleming, Bishop James E. William W. Bride, . W. Flynn, Gen. George S. Gibbs, Warren Irving Glover, Maj. J. C. Buy at— STAR, these WASHINGTON, Gotwalls, E. C. Graham, Gilbert Gros- venor, Alvin W. Hall, Willlam F. Ham, gm&m{fl. Hanna, H. H. Hartman, nford C. Hooper, David S. I R. B. Keech, Dr. Julius K lelh, D, C. H. Marvin, Lowell Mellett, Bishop Wil- liam F. McDowell, Dr. T. J. McKav- anagh. Richard V. Oulahan, Gen. H. M. Patricf, John Poole, Luther H. Reich- egdgrr Gen. Charles McK. Saltzman, G Otis Smith, Aubrey Taylor, Merly Thorpe, George A. G. Wood, N. J halen, Clarence M. Young, Prof. Lew|s Bliss, Lloyd B. Wilson, Samuel J. Prescott, John Joy Edson, E. F. Colla- day, Theodore W. Noyes, W. W. Everett and A. C. Case. —_— i The government of Argentina will increase its public works activities, D. 1, M. D. Sedam, Jouett Shouse, C., THURSDAY, CONFLICT OF TRADE AND POLITICS SEEN Holiday of Parliaments Would Be Wise, Owen D. Young Says After Return to U. 8. By the Associated Press. NEW YORK, December 4.—Economics and politics are in conflict and must be reconciled, in the opinion of Owen D. Young. Speaking before the Lotos Club last DECEMBER 4, 1930. night, following his return from Eng- land, the ‘“Eflf of the Young plan for rej § ““The forces are violent and imposing. Some better way must be found of ac- commodating each to the other or they will destroy each other. A some European countries the question is being seriously discussed of providing economic parliaments in ad- dition to political ones in order that men especially qualified for the hand- ling of these difficult economic problems may deal with them. “It has even been suggested that if a holiday of armaments is good a holiday of parliaments would be better.” America should a tolerant creditor, he said, in appeal! for “adequate un- derstanding by the greatest nation in the world in order that its privileges and responsibilities of leadership ma: nu:t 1"12 in these times and betor'; it fl BOY GIVEN SIX LASHES “Birch” Applied to Youth Aiding Adult Handling Stolen Goods. LONDON, December & (#).—The old | teaching, “Spare the rod and spoil the | child,” is still taken literally in certain official circles here. 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