James G. Biddle Company · Philadelphia : James G. Biddle · leaf 19
0 v. direct current. U. S. Dept. of Agriculture, Washington, D. C. 12 Roentgen Coil without interrupter ; used with electrolytic inter-rupter on no v. direct current. Dr. Frank C. Parker, Norristown, Pa. I2// Roentgen Coil with electrolytic interrupter ; operated from no v.direct current. Dr.… … FIGURE 7. Roentgen Coil, with primary of variable inductance, mounted on handsome•cabinet with solid doors. Self-starting mechanical and electrolytic interruptersare provided (the latter not shown) ; also Weston Ammeter, Weston Voltme-ter, controlling rheostat for no volts, adjustable mica…
X-rays · Radiography
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