United States. Surgeon-General's Office, American Roentgen Ray Society · New York : Middleditch · leaf 33
mmeter. R—Resistance in battery cathode circuit. MA—Milliammeter. The current through the tube cannot be increased afterthe supply of electrons is entirely utilized, no matter howmuch the voltage is raised. This maximum current foreach particular filament temperature is named the satu-ration… … Fig. 7. Coolidge set up with storage battery[for lighting: filament.
