Electrical Engineer

Discussing methods of telegraphing to Mars, Mr. Nikola Tesla says: “The inhabitants of the planets, Mars, for example, must have intelligence. Their life must be made up of events. They must have a...

The observations of Mr. Edison, recorded in his article in The Electrical Engineer of April 8, do not appear to me to warrant the conclusion at which he arrives. It is well known that sound shadows...

If the terminals or plates of a condenser be connected with two points of a circuit, the potentials of which are made to rise and fall in rapid succession, the condenser allows the passage, or, more...

The Tesla motor is to be introduced in the coal mines of the State of New York. The management of the Shawmut coal mines has just made a contract with the Westinghouse Electric Company for seven of...

On giving our secretary the title of this paper it was my purpose to treat the subject in a broader light, and to show the progressive steps in a series of experiments which led eventually to the type...

BY EDWARD P. THOMPSON, M. E. One of the most important facts necessary in order to determine the nature of the X-rays is that which will prove their source. In the first place Prof. Röntgen alleges...

Last week Mr. Tesla gave some of the results of his experiments in the domain of Röntgen rays, before the New York Academy of Sciences, and showed some of his latest types of high frequency generators...

A series of experiments extending over the past six weeks has at length yielded conclusive evidence and enabled the source and distribution of the ray to be mapped out around the entire tube with...

On another page we give a brief description of one form of Mr. Tesla's mechanico-electric oscillator, which formed part of his exhibit in Chicago. It would be hardly possible at this moment to foresee...