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 116
i in. diameter. A single zinc cut in two will answerwell. The electrodes are held in supports of brass rod,suitably drilled and help upright upon a base that shouldpreferably be of marble. If marble is not available, hard ^4 To fit inside ofcy/inc/er K vo ® … sSeconcfory cyifncfer^ z re(^d Fig. 55.—Details of secondary cylinders i wood will answer. Slate should not be used as the minutej metallic veins found in some varieties render the substancei unsuitable for this purpose. Connecting and Using.—Fig. 58 shows how to connectthe apparatus. The spark gap…
Electric apparatus and appliances
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