""Wireless Telegraphy: Popularly Explained"" is a book written by Richard Kerr and published in 1898. It is a comprehensive guide to the technology of wireless telegraphy, which was a relatively new field at the time. The book covers the history of wireless telegraphy, the principles of electromagnetic waves, and the various types of wireless telegraphy systems that were in use at the time, including Marconi's system. It also explains the practical...