New Britain herald., 1922-03-29
PREDICTS WIDE USE . OF WIRELESS PHONE
Radio Expert Talks to Big Crowd
 Of Fans in This City
25e and 75t Packages Everywhere

All important news events will be broadcasted by wireless within short time, according to David Moore, a wireless expert of Hartford, in an ad dress given to several hundred radio fans as guests of the New Britain branch, American Society of Mcchan- ical Engineers, in the Central Junior High school last evening.
 Mr. Moore commenced his talk by explaining static electricity. He said there are mary differences of opinion in regard to the time best suited for radio broadcasting, day, night, sum mer or winter. Expert radio men who have experimented with equipment in all times and all kinds of weather, de- clare that a clear summer evening will obtain the best results. Electri- cal waves travel from five to ten times farther at night than by day.
 Invented By Hertz.
 Going into the history of wireless, Mir Moore said the generally accepted feeling that Marconi invented the wireless, is wrong. Hertz a German professor found that spark would jump across four foot space and that changing the position of the four foot space would cause the spark to vary slightly in length This was the beginning of wave lengths.
 Developed By Marconi.
 From the time of this discovery to the time of Marconi radio matters were at a standstill He invented and perfected radio equipment until he could send a message across the At lantic ocean.
 A little later the Galena crystal was discovered and found to be good ma terial for short wave lengths The sneaker explained the making of the simplest and least expensive Galena set but said that set like that would not be suitable for New Britain anna teurs as it would be able to receive a concert from d distance only as iaf away as Hartford under the pest weather conditions.
 Generating Power.
 "To make the least noise in the phones only .00o005 amperes of cur rent is necessary to pass through the set. The question has been asked Why cannot wireless be used to ring bells, make light and other electrlca works?' The only answer is that up to this time wireless has been per fected enough to make noise only. He went on to say Each broadcast ing station is assigned a wave length upon government inspection. This IS determined by the size and strength of the set, The shortest wave length is for amateurs, 175 to 200 meters The next is 300 to 800 metres TOT phone broadcasting stations. All navy stations have wave lengths up to 1900 metres, while the government stations have up to 2500. The high est wave length used is from 5000 to 25ooo metres by high powered sta tions.
 Locating Positions At Sea. "At present there Is method by which a ship within 200 or 300 miles from shore can learn its exact posi- ton, by calling the nearest govern ment station. The three nearest sta lions figure out the direction from which the signal comes and the exact position of the ship is determined The position given is always wlthlr 200 or 300 yards of the true one anc the entire process takes only two ol three minutes.
 The Vacuum Tube.
 The next invention was the vacuum tube which is used as detector. rms did not produce very good results un' til pr. deForest invented a new fli' ment.
 According to MT. Moore, with the average set one can hear Boston