FARADAY, MICHAEL.

Experimental Researches in Electricity. - Twenty-ninth Series. § 35. On the employment of the Induced Magneto-electric Current as a test and measure of Magnetic Forces. (Sections 3177-3242). received December 31, 1851 - Read March and 25 and Aprol 1, 1852.

(London, Richard Taylor and William Francis, 1852). 4to. No wrappers as extracted from "Philosophical Transactions" 1852 - Part I. Pp. 137-159, textillustr. Clean and fine.

First appearance of this paper dealing with establishing his concept of "lines of force" in connection with the experimentally obtained results for the magnetic force of the earth. The paper also discusses ways of determining and measure magnetic and electrical forces.

From 1831 to 1852 Michael Faraday published his "Experimental Researches in Electricity" in The Philosophical Transactions of the Royal Society. These papers contain not only an impressive series of experimental discoveries, but also a collection of heterodox theoretical concepts on the nature of these phenomena expressed in terms of lines of forces and fields. He published 30 papers in all under this general title.They represents Faraday's most importent work, are classics in both chemistry and physics and are the experimental foundations for Maxwell's electro-magnetic theory of light, using Faraday's concepts of lines of force or tubes of magnetic and electrical forces. His many experiments on the effects of electricity and magnetism presented in these papers lead to the fundamental discoveries of 'induced electricity' (the Farday current), the electronic state of matter, the identity of electricity from different sources, equivalents in electro-chemical decomposition, electrostatic induction, hydro-electricity, diamagnetism, relation of gravity to electricity, atmospheric magnetism and many other.

"Among experimental philosophers Faraday holds by universal consent the foremost place. The memoirs in which his discoveries are enshrined will never ceaseto be read with admiration and delight; and future generations will preserve with an affection not less enduring the personal records and familiar letters, which recall the memory of his humble and unselfish spirit."(Edmund Whittaker in A History of the Theories of Aether and Electricity).

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