Quote: invert a helix to demonstrate the direct magneto-electric induction of the earth

Quotation

148. The favourable results led me to hope that the direct magneto-electric induction of the earth might be rendered sensible; and I ultimately succeeded in obtaining the effect in several ways. When the helix just referred to ... was placed in the magnetic dip, but without any cylinder of iron or steel, and was then inverted, a feeble action at the needle was observed. Inverting the helix ten or twelve times, and at such periods that the deflecting forces exerted by the currents of electricity produced in it should be added to the momentum of the needle ..., the later was soon made to vibrate through an arc of 80.degrees. or 90.degrees.. ... 149. Guided by the law already expressed ..., I expected that all the electric phenomena of the revolving metal plate could now be produced without any other magnet than the earth.   Google-1   Google-2

Published before 1923

Related Topics

Topic: electricity and magnetism (50 items)