High frequency apparatus, design, construction and practical application; a practical treatise for electrical engineers, electricans, physicians, students and experimenters (1920)
Curtis, Thomas Stanley · New York, Norman W. Henley publishing company · leaf 179
et wide by 20 feet long. This was situated across ayard and SO feet from the companion bed used for purposesof comparison. The two beds were boxed in with lumberand topsoil was taken from the same load for each; in fact,the conditions were as nearly identical as it was possibleto make them. Four… … Fig. 86.—Showing span of wires to carry the high tension current over a plot ofground in which plants are to be cultivated carefully insulated with two porcelain cleats in series atthe end of each wire and a common lead connected the spanof wires at one end as shown in the illustration. A…
Electric apparatus and appliances
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