Technical World

Almost any evening last fall a tall, spare man, whose discouraged looking mustache remains a glossy black without any aid from the barber in spite of the fact that its wearer is well past his fiftieth...

By Thomas Waller The news that certain disturbances are affecting radio receiving instruments on both sides of the Atlantic has given rise to the hypothesis that some other planet is signalling us...

Nikola Tesla bears an honored name in electrical science and has done memorable work in oscillatory currents and in connection with Hertzian waves. A few years ago, it may be remembered, he stood in...