Daily Arizona silver belt., 1909-04-11
AMAZING RESULTS OBTAINED USING EITHER AS MEDIUM
 0F TRANSMISSION
Remarkable Little Machines Installed in Los Angeles Between Bank and Department Store Said to Be Working in Very Successful Manner.

LOS ANGELES, April 7.-PubIic us,
 of wireless telephone in one of tn. big department stores of this city ii
 attracting a great amount of interest
 and great crowds are always waiting
 in line to try it. Many of those who
 throng the machines are doubters and
 "Pooh, poohl'' the idea of being able
 to talk without the use of wires, but , after one trial, during which it is anus.
 ing to watch the utter amazement de.
 piceted on their fa ;es, they are con- vertod and usually mLke the stock re-
 mark ''I told you of course we can
 talk without wires. In this age anything
 is possible.
 News that the wireless telephone had
 been perfected and was a reality has
 filled the press for some time, but it
 was not until recently that the public
 was given a chance to see for them selves that it was really so.
 Until the last five years wireless tel cphone communication was considered a dream, but the inventor, A. Frederick Collins of Philadelphia, has been per fecting it for nearly ten years and the completion of his labor marked the birth of the Collins Wireless Telephone Company, which is now installing the wireless phone and which has made to commercial utility. In reaching the present successful development of the wireless transmission of speech the inventor faced many obstacles. The first great one was to obtain medium which would carry tie words spoken. After much investigation it was discov- cred that the ether in the atmosphere was the ideal medium and this was util- ized. Until very recent years the very existence of ether was unknown and few facts about it are of interest. Ether is found wherever there is air and by using it as the medium for transmission it is possible to telephone through brick walls, the earth, and in fact any ob- stacle which may be found on or below the surface of the globe This is equal ly true with water and in this way it is possible to communicate with subma- rine boats at no matter what depth they may be immersed. Ether is many nil lion times lighter than air and fills all space. It is unaffected by heat or cold and therefore there car be TO climatic disturbance of transmission in the use of the wireless telephone.
 The greatest difficulty which had to be overcome was that of obtaining pri- vacy in sending the speech. After find ing that speech could be transmitted through the ether, the inventor com menced the investigation of the manner in which it could be made private and only received by the proper person. showed that this was to be secured in a very simple manner. By using the principle of the we'll known musical tuning fork it was 70 sible to obtain absolute privacy. It is done i'll this way. A dial similar to that of the combination of safe is placed on the phone and this dial carries num- bers from one to ten. When Jones de- sires to talk to Smith, whose number is, let us say, sG9, all Jones has to do is to turn the dial first to 8, then to , D, and then to and Smith s telephoae 1 bell will ring and call him and tell hin that he is wanted. The same may be done with any combination of num- bers. The result obtained by this ma nipulation is that when the number is marked off on Jones telephone he is in "tne'' with Smiths phone and therefore rings him up. In this way any two persons may hold converse. .ion and there is uo Central or atter- ',.