Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 344
en rays. THE INDUCTION COIL. 325 capable of producing rays of this light, it penetrates themwith different intensities, according to their density, so thatthe sensitized plate, upon development, shoAvs the shadows ofthe objects inter- ^C posed. A photographic print made from such a (|(i… … Fig. 293.—Focus Tube for X-Ray Work. penetrates the flesh and affects portions of the plate directlyunderneath it. A print made from such a negative givesshadows of the bones and a faint outline of the flesh. Theshadows of the bones in all animal bodies can thus be made,and broken bones andforeign…
Electricity · Magnetism
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