Induction coils : how to make, use, and repair them including Ruhmkorff, Tesla, and medical coils, Roentgen radiography, wireless telegraphy, and practical information on primary and secondary battery (1901)
Schneider, Norman H. (Norman Hugh) · New York : Spon & Chamberlain ; London : E. & F.N. Spon · leaf 181
human retina is only capable of re-taining an impression for a fraction of asecond, and as the tube is only momen-tarily luminous during the passage of thespark, the effect of the revolving tube isthat of a series of such arranged as theradii of a circle, the number apparent,being governed by the… … W Fig. 49. effects. Such a wheel, placed in a storewindow, would undoubtedly attract manypersons by the beautiful variations of col- Rotating Effects. 155 ored figures which it presents while inmotion. And once a crowd is collectedand its attention attracted to one spot, thecapabilities of…
Induction coils · Radiography · X-rays
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