Practical radiography : a handbook for physicians, surgeons, and other users of X-rays (1901)
Isenthal, A. W, Ward, H. Snowden (Henry Snowden), 1865-1911 · London : Published for The Photogram, Ltd. by Dawbarn and Ward, Ltd. · leaf 69
Fig. 18. of Paris. Starting from the assumption that the lowefficiency of the ordinary type of coil is to be ascribed tothe great resistance of the secondary windings and toleakage taking place in the coil itself, they have inventeda new insulation consisting of some special hydrocarbonin the shape… … Fig. 19. from the disqualifying peculiarity of carbonizing after use. Fig. 20 shows the arrangement of such a coil; theprimary is similar in all respects to that of an ordinaryinduction coil. The secondary, however, consists of asingle bobbin of fine wire, weighing about lj lbs. only,which is…
Radiography · X-rays
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