Evening Republican, Volume 23, Number 154, Rensselaer, Jasper County, 26 June 1920 — WIRELESS TELEPHONES USED BY FORESTERS [ARTICLE]

WIRELESS TELEPHONES USED BY FORESTERS

Preliminary Tests Show Invention Can Be Employed to Advantage. Preliminary tests of the wireless telephone by officers of the forest service, United States department of agriculture, In the vicinity of Portland, Ore., lead to the belief that this invention can be utilized extensively in the national forests, especially in fireprevention work. While it is recognized that there are conditions limiting wireless telephone transmission, the results so far are pronounced very satisfactory. One of the sets used in the tests was installed on Mount Hood, Oregon, where the problem of providing a satisfactory support for the antennae was a difficult one, since a mast was needed which would be strong enough to resist the 70 or 80 mile gales that sweep the mountains. At the same time the mast had to be light enough for the men to be able to raise and lower it before the sleet storms. A 50-foot bamboo pole was finally selected as the support. In the telephone conversations between the sets, some of which were ten miles apart, the voice carried very clearly and was about as loud as over a wire line. Telegraph signals from many stations scattered over the continent were* picked up. On Mount Hood they often were so loud as to be audible In any part of the cabin.