![Practical wireless telegraphy; a complete text book for students of radio communication . Referring to the dia-gram (Fig. 279) : Thechoking inductances areindicated at C-1 and C-2;the regulating resistancefor the arc Practical wireless telegraphy; a complete text book for students of radio communication . Referring to the dia-gram (Fig. 279) : Thechoking inductances areindicated at C-1 and C-2;the regulating resistancefor the arc](https://c8.alamy.com/comp/2CRK3N5/practical-wireless-telegraphy-a-complete-text-book-for-students-of-radio-communication-referring-to-the-dia-gram-fig-279-thechoking-inductances-areindicated-at-c-1-and-c-2the-regulating-resistancefor-the-arc-shown-at-ris-connected-in-serieswith-the-blow-out-mag-nets-placed-at-right-anglesto-the-arc-a-source-ofdirect-current-of-500volts-is-connected-to-thearc-gap-the-plus-pole-ofwhich-is-constructed-ofcopper-the-minus-pole-ofcarbon-an-arc-transmitter-ofthis-type-is-adjusted-foroperation-as-followsthe-arc-is-struck-at-lowvoltage-by-connectinglarge-values-of-resist-ance-in-the-cir-2CRK3N5.jpg)
Practical wireless telegraphy; a complete text book for students of radio communication . Referring to the dia-gram (Fig. 279) : Thechoking inductances areindicated at C-1 and C-2;the regulating resistancefor the arc
![The principles underlying radio communication . o run automatically, at theproper speed for the generator, or perhaps it would be betterto say that there are certain definite speeds at which 60-cyclea.c. The principles underlying radio communication . o run automatically, at theproper speed for the generator, or perhaps it would be betterto say that there are certain definite speeds at which 60-cyclea.c.](https://c8.alamy.com/comp/2CRMM4J/the-principles-underlying-radio-communication-o-run-automatically-at-theproper-speed-for-the-generator-or-perhaps-it-would-be-betterto-say-that-there-are-certain-definite-speeds-at-which-60-cycleac-motors-have-to-run-and-the-generator-has-such-a-numberof-poles-that-it-gives-the-desired-frequency-when-driven-by-amotor-operating-at-one-of-these-speeds-voltage-control-of-thegenerator-is-secured-by-means-similar-to-those-shown-in-fig120-motor-driven-by-d-c-motorwhen-direct-current-at-110volts-is-available-the-arrangement-is-somewhat-different-theexciter-is-unnecessary-because-cu-2CRMM4J.jpg)
The principles underlying radio communication . o run automatically, at theproper speed for the generator, or perhaps it would be betterto say that there are certain definite speeds at which 60-cyclea.c.
![Practical wireless telegraphy; a complete text book for students of radio communication . ect current B to which is connected a resistance R and an ammeter A in series ^^- ^^ Practical wireless telegraphy; a complete text book for students of radio communication . ect current B to which is connected a resistance R and an ammeter A in series ^^- ^^](https://c8.alamy.com/comp/2CRKTTC/practical-wireless-telegraphy-a-complete-text-book-for-students-of-radio-communication-ect-current-b-to-which-is-connected-a-resistance-r-and-an-ammeter-a-in-series-and-if-the-voltage-at-b-is-progressively-increased-the-flow-of-current-as-indicated-by-the-ammeter-increases-in-the-direct-ratio-in-accordance-with-ohms-law-furthermore-if-we-plot-the-results-of-this-experiment-in-the-form-of-a-graph-on-cross-section-paper-as-in-fig-iss-we-find-that-a-line-drawn-common-to-all-co-ordinate-points-located-in-accord-ance-with-the-data-will-be-straight-anduniform-let-it-be-noted-fr-2CRKTTC.jpg)
Practical wireless telegraphy; a complete text book for students of radio communication . ect current B to which is connected a resistance R and an ammeter A in series ^^- ^^
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![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)