Word: magnetism
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...Familiar Letters of William James," soon to be published by the Atlantic Monthly Company, there is a letter to Josiah Royce which shows the warm and intimate friendship which existed between these two great minds. "You are still the center of my gaze, the pole of my mental magnet," writes Mr. James. "When I write, 'tis with one eye on the page, and one on you. When I compose my Gifford lectures mentally, 'tis with the design exclusively of overthrowing your system, and ruining your peace...
That the new plan will act as a magnet to draw equal representation from all over the country can hardly be expected. Its purpose is merely to open the door so that an entire extra year of preparation will not be needed for men who have not gone to Harvard fitting schools. Making Harvard more nationally representative is a distinct work. The new plan can only remove the brake to progress in that direction which the old plan had clamped...
...present shape was in 1876, when a very simple apparatus, which could transmit a few words and phrases, was placed on exhibition at the Centennial Exhibition by its inventor, Mr. Alexander Graham Bell. The first form was what is known as the magneto telephone, which consisted of an electro magnet at each end of the line in front of which were placed armatures. When one of these armatures was vibrated the same vibrations were observed in the other. Mr. Bell then found that by means of a small diaphragm he could transmit the sound waves made by the voice...
...speaker said in substance: Although we can only conjecture what electricity is we are practically interested in what it does. The principle of the dynamo is that a continuous wire revolving under the influence of a magnet has electrical currents induced in it, and this induced current is sent out to do work...
...more powerful machines are called "Series machines," in which the current from the dynamo is strengthened by passing through all the large coil of its electric-magnet. The ordinary are light is made by breaking the outside circuit of a Series machine. The carbon tips must be together when the current is started, and the break is made by lifting the upper one a little by a mechanical arrangement. The powerful current, in overcoming the resistance offered by the air, heats the carbon tips to a white heat. In the incandescent lamp the resistance is offered by a filament...