ELECTRICIAN AND MECHANIC was a science and technology magazine published from 1890 to January, 1914, when it merged with MODERN ELECTRICS
to become MODERN ELECTRICS AND MECHANICS. The new publisher, Modern Publishing, began a series of magazine mergers and title changes so numerous that librarians began to complain. In October 1915 the publishers took over yet another magazine, taking its title so that the new title of this magazine became POPULAR SCIENCE MONTHLY
. The magazine is still published under that name today.
Thanks to Michael Holley for this information! The full story is even more complex and intertwined, and can be found on Wikipedia