The December 2023 issue of IEEE Spectrum is here!

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Book: The History of Radio, in Pictures and Words

A coffee-table book from the American Museum of Radio and Electricity chronicles five centuries of progress

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METER IN A JAR: Chemistry also formed the basis of Thomas A. Edison’s first electric meters. Ever since Michael Faraday, it was known that the transfer of metal from one plate to another in an electrolytic bath is proportional to the current. Edison’s meter held a jar with two copper plates, one of which was removed and weighed for customer billing. The method was neither convenient nor accurate and was soon discontinued.
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