...[ELECTRO-MAGNETISM, vol. ix., p. 342.] ' Thus,' explains Mr. Cooke (Telegraphic Railways, p. 14), ' as a natural stream of electricity passing round the...artificial stream of electricity of adequate strength will cause magnetic needles placed within its influence to be similarly deflected at right angles to...

...needle may, through the agency of a Voltaic current, be invested with an artificial polarity. Thus, as a natural stream of electricity, passing round...artificial stream of electricity, of adequate strength, will cause magnetic needles, placed within its influence, to be similarly deflected at right angles...

...needle may, through the agency of a voltaic current, be invested with an artificial polarity. Thus a natural stream of electricity passing round the...artificial stream of Electricity of adequate strength, will cause magnetic needles, placed within its influence, to be similarly deflected at right angles...

...¡м.кстяо-Млонвпзм, vol. ix . p. 342.] ' Thus,' explains Mr. Cooke (Telegraphic AJJ.tvays, p. 14), ' as a natural stream of electricity passing round the circumference of the earth causes magnet»,needles in general to be deflected at right anglt-s to ns course, or towards the north and...

...was the state of the discoveries on the subject up to the period of Messrs. Cooke and Wheatstone' s invention. Their invention was founded upon the principles...ordinary voltaic battery, and a metallic wire were laid clown, suppose between London and Birmingham, and a magnetic needle were placed near to any part of...

...needle ms.r, through the agency of a voltaic current, be invested with an artificial polarity. Thus, as a natural stream of electricity, passing round...artificial stream of electricity, of adequate strength, will cause magnetic needles, placed within its influence, to be similarly deflected at right angles...