Now we come to what I consider the “fun” part of this article: Granville Woods’ inventions and patents. There are some who say that the number of patents Woods obtained is at least 60, may be even ...

Last week I began this discussion of Civil War infrastructure in Arkansas with a look at roads, railroads, bridges, and manufacturing of war material. The story continues with a look at telegraphy, ...

WHY Mr. Beechy should wish to depart from ordinary usage and call his book electro-telegraphy rather than electric telegraphy, we have no idea. The assumption of an eccentric title for a scientific ...

A VERY large number of books on radio telegraphy and radio telephony have recently been published. Many are of little use to the general scientific reader because they are too elementary; others fail ...

With his newly created Tesla coils, the inventor soon discovered that he could transmit and receive powerful radio signals when they were tuned to resonate at the same frequency. When a coil is tuned ...

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Father wouldn`t give me permission to go into the services but my mother, who was of an understanding disposition, signed the form for the Wrens without his knowing; he gave in gracefully when my ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...

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KEYMILE’s HY101-WT2400 is a voice frequency telegraphy modem in a compact standard housing. Some of the typical areas this tried-and-tested technology is used include traditional telecontrol ...