Project Gutenberg 2005-04-14 Public domain in the USA. 338 American School of Correspondence Armour Institute of Technology. American School of Correspondence American School at Armour Institute of Technology Cyclopedia of Telephony and Telegraphy, Vol. 1 A General Reference Work on Telephony, etc. etc. Produced by Ronald Holder and the Online Distributed Proofreading Team at https://www.pgdp.net. "Cyclopedia of Telephony and Telegraphy, Vol. 1" by the American School of Correspondence is a comprehensive scientific publication written in the early 20th century. This work serves as a general reference on various aspects of telephony and telegraphy, including technical principles, equipment, systems, and their operations. It aims to provide engineers and technicians with an authoritative overview of the electrical transmission of intelligence, detailing the intricacies of devices and methodologies involved in communication. The opening of the cyclopedia introduces readers to the foundational concepts of telephony, discussing the historical significance of Alexander Graham Bell and his invention of the telephone. It explains critical principles, such as the nature of sound and its transmission through different mediums, as well as the workings of telephone and telegraph systems. The text emphasizes the complexity behind the simplicity of effective communication and sets the stage for in-depth discussions about acoustic principles, the development of switchboards, and the transmission mechanisms central to the functioning of telephony and telegraphy. (This is an automatically generated summary.) Reading ease score: 54.7 (10th to 12th grade). Somewhat difficult to read. en Telephone Telegraph TK Text Technology Category: Engineering & Technology Category: Encyclopedias/Dictionaries/Reference 1078724 2025-07-07T03:34:06.239469 text/html 1051002 2020-12-14T09:58:41 text/html 18635835 2025-07-07T03:35:15.894605 application/epub+zip 18508820 2025-07-07T03:34:28.422345 application/epub+zip 385419 2025-07-07T03:34:11.358388 application/epub+zip 30106247 2025-07-07T03:35:40.438496 application/x-mobipocket-ebook 29888352 2025-07-07T03:34:50.156755 application/x-mobipocket-ebook 548960 2022-09-07T22:45:31.146748 application/x-mobipocket-ebook 821196 2025-07-07T03:34:01.328468 text/plain; charset=us-ascii 821298 2020-12-14T09:58:41 text/plain; charset=us-ascii 821339 2020-12-14T09:58:41 text/plain; charset=us-ascii 21306 2025-07-07T03:35:41.118461 application/rdf+xml 20098 2025-07-07T03:34:12.024391 image/jpeg 4482 2025-07-07T03:34:11.713406 image/jpeg 255145 2020-12-14T09:58:41 application/octet-stream application/zip 19733138 2020-12-14T09:58:42 application/octet-stream application/zip 255092 2020-12-14T09:58:42 application/octet-stream application/zip 19797920 2025-07-07T03:34:08.081426 application/octet-stream application/zip Archives containing the RDF files for *all* our books can be downloaded at https://book.klll.cc/wiki/Gutenberg:Feeds#The_Complete_Project_Gutenberg_Catalog en.wikipedia