Researches into the identity of the existences or forces, light, heat, electricity and magnetism | Zendy

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Researches into the identity of the existences or forces, light, heat, electricity and magnetism

Author(s) -

John Goodman

Publication year - 1854

Publication title -

abstracts of the papers communicated to the royal society of london

Language(s) - English

Resource type - Journals

eISSN - 2053-9134

pISSN - 0365-0855

DOI - 10.1098/rspl.1850.0037

Subject(s) - galvanometer , electricity , magnetism , optics , period (music) , materials science , engineering , electrical engineering , physics , acoustics , laser , condensed matter physics

In this communication the author describes the effects that were produced on a moderately sensitive galvanometer by exposure to the sun’s rays, and which were observed by him during a period of four months, commencing on the 14th of November, 1850. The instrument is described as consisting of forty-six turns of covered copper wire, 1/25th of an inch in diameter. The helix is blackened with ink at its southern extremity, and has a single magnetized sewing-needle suspended by about sixteen inches of silken fibre in its centre.

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