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![Practical wireless telegraphy; a complete text book for students of radio communication . e automatic starter are energized by direct current from the main D. C. line and operated by a Practical wireless telegraphy; a complete text book for students of radio communication . e automatic starter are energized by direct current from the main D. C. line and operated by a](https://c8.alamy.com/comp/2CRK78G/practical-wireless-telegraphy-a-complete-text-book-for-students-of-radio-communication-e-automatic-starter-are-energized-by-direct-current-from-the-main-d-c-line-and-operated-by-a-distant-control-switchwhen-this-switch-is-closed-the-solenoid-a-is-energized-and-moves-the-contact-arm-cradially-in-a-vertical-plane-perpendicular-to-the-board-which-cuts-in-the-single-resistance-unit-mounted-in-the-re-sistance-box-behind-thepanel-as-the-speed-of-themotor-generator-in-creases-the-currentfalls-off-and-the-poten-tial-difference-acrossthe-armature-riseswhen-it-reaches-normalvalue-the-so-2CRK78G.jpg)
Practical wireless telegraphy; a complete text book for students of radio communication . e automatic starter are energized by direct current from the main D. C. line and operated by a
![The principles underlying radio communication . Fig. J 03Field RheostatJLetters correspond m the ttvo figuresPP -Binding posts A - Contact JTrm SS - Contact studs R - Resistance wire. Scheme of The principles underlying radio communication . Fig. J 03Field RheostatJLetters correspond m the ttvo figuresPP -Binding posts A - Contact JTrm SS - Contact studs R - Resistance wire. Scheme of](https://c8.alamy.com/comp/2CRMMFP/the-principles-underlying-radio-communication-fig-j-03field-rheostatjletters-correspond-m-the-ttvo-figurespp-binding-posts-a-contact-jtrm-ss-contact-studs-r-resistance-wire-scheme-of-connections-of-alternatore-exciter-armature-f-alternator-feld-corls-r-alternator-field-rheostat-a-alternator-armature-84-effect-of-speed-on-regulationsince-the-emf-is-propor-tional-to-the-rate-of-cutting-of-flux-it-follows-that-fluctuationsof-speed-are-attended-with-proportional-fluctuations-of-voltageprovided-the-field-excitation-is-not-changed-at-the-same-time-direct-current-generator-2CRMMFP.jpg)