![]() ![]() ![]() After laborious transformations, he extracted a remarkably simple result: S = E × H-the flow of energy at a point in space is simply the vector product of the electric and magnetic fields there. As Heaviside saw it, telegraphy was ultimately about sending energy cleanly-without distortion-along a wire, and he dug into the equations in the Treatiseto find how electromagneticenergy would move. Maxwell had given formulas based on the electric and magnetic fields E and H for how energy is distributed in the field, but he never explained how it got from one place to another. Heaviside made his greatest advance in the summer of 1884, while exploring how energy moves through the electromagneticfield. It was not much-Heaviside later said for years he had“earned less than a hodman”-but his needs were modest, and the money, while welcome, was less important to him than having a steady outlet for his writings. The Electrician paid Heaviside about £40 a year for his articles. Over the next 20 years, apart from a gap of about 3 years, the Electrician carried something from Heaviside’s pen every few weeks,altogether enough to fill 1700 pages in his collected works. Biggs,invited him to become a regular contributor. (In the usage of the time, an electrician was any expert on electrical science or technology, rather than a tradesman who wired up buildings.)Heaviside had written a few short pieces for it, and in 1882 its editor, Charles H. The Electrician was a weekly trade journal owned by cable interests, and though its pages were crowded with advertisements and commercial notices, it also carried quite advanced articles on electrical theory and practice. At the same time that Heaviside was taking up Maxwell’stheory, he was finding a new place to publish.
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