. Canadian forestry journal. Forests and forestry -- Canada Periodicals. 1178 Canadian Forestry Journal, June, 1917 New Devices in Protective Work By COERT DUBOIS, U. S. Forest Service About a year ago there came across my deck a newspaper clipping about a small wireless apparatus operated by the power generated by four dry bat- teries, invented by one Dr. H. Bar- ringer Cox, of Bedford Hills, New York. On a chance I wrote Doctor Cox of our interest in a low-power wireless, described our communica- tion problem in protection work, and asked him what he had. He, in turn, was so interested in th
. Canadian forestry journal. Forests and forestry -- Canada Periodicals. 1178 Canadian Forestry Journal, June, 1917 New Devices in Protective Work By COERT DUBOIS, U. S. Forest Service About a year ago there came across my deck a newspaper clipping about a small wireless apparatus operated by the power generated by four dry bat- teries, invented by one Dr. H. Bar- ringer Cox, of Bedford Hills, New York. On a chance I wrote Doctor Cox of our interest in a low-power wireless, described our communica- tion problem in protection work, and asked him what he had. He, in turn, was so interested in the project of developing his invention in co-opera- tjon with forest protection work that he packed up and came out to Cali- fornia. He arrived last January, and established his laboratory and work- shop on a canyon ranch in the Santa Barbara National Forest. The essentials of Doctor Cox's system are what he calls the sending and receiving "loops:" these corre- spond to the aerials in wireless tele- graphy, and, as finally worked out, consist of two 2-inch galvanized iron pipes about 30 feet high, set upright â¢^ D^^m a^^u ^^B n^^DB^^ â â Try This Stump Pullet^ at Our Risk ^^-^-«'^'t>^;'i!r 1. YALE UNIVERSITY FOREST SCHOOL New Haven, Connecticut, YALE University Forest School is a graduate department of Yale Uni- versity. It is the oldest existing forest school in the United States and exceeds any other in th« number of its alumni. A general two-year course leading to the degree of Master of Forestry is offered to graduates of universities, colleges and scientific institutions of high standmg, and, under exceptional conditions, to men who have had three years of collegiate training including certain prescribed subject*. Men who are not candidates for the degree may enter the school as special students, for work in any of the subjects offered in the regular course, by submitting evidence that wUl warrant their taking the work to their ow
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