Radiography and the 'X' rays in practice and theory : with constructional manipulatory details (1898)
Bottone, Selimo Romeo · London ; New York : Whittaker & Co. · leaf 60
of the spark can be regulated,%\ithout altering the battery or source of current, from \ in. to nearly12 in. in less than one second. The quickness of the break is exactlyadjusted to the best point. Very erroneous ideas were prevalent as tothe nature of the break of current; and, to verify the… … FiG. 13.— Vkil Contact-Bkkakeu. num-tipped screw, at f, and it is not until the clapperhead has travelled through a certain distance, which utility, about twenty-five years ago Mr. Apps designed and constructedfor the late Mr. H C. Baines, of Pembroke College, a wheel brake, withwedge and lever…
Electric radiation · X-rays · Radiography
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