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The great principle of the dynamo, or electric generator, was discovered by Faraday and Henry but the process of its development into an agency of practical power consumed many years; and without the dynamo for the generation of power the electric motor had to stand still and there could be no practicable application of electricity to transportation, or manufacturing, or lighting.

EDISON had no sooner designed his dynamo in 1879 than he adopted the same form of machine for use as a motor. The two are shown in the Scientific American of October 18, 1879, and are alike, except that the dynamo is vertical and the motor lies in a horizontal position, the article remarking: "Its construction differs but slightly from the electric generator."

Then a missle was thrown upward a portion of a broken generator a heavy chunk of metal. It barely missed Maida, and fell with a thump to the roof behind us. Then came others a rain of them about us. I tried to pull Maida back, but she fought me, her voice still calling out its appeal. With a bound, Georg was up on the rail beside her. Aften the young Earth man had quietly handed him a cylinder.

The engineers of that station, while recognizing the high value of the distributing system, went back to Edison's original scheme of a compact direct-connected steam and electric generator, but with dynamos of the multipolar type designed and built by Siemens & Halske, of Berlin, the engines being of vertical marine type.

Every man without exception rides out no dodging is permitted and the moment the malicious fiend of an orderly officer gets clear of the barracks he gives the word "Trot!" Six miles of it without a break is the set allowance; and it beats vinegar, pickles, tea smoked in a tobacco-pipe, or any other nostrum, as an effectual generator of sobriety.

We have that transformation of iron all worked out in theory, and as soon as we get a generator going we can straighten out everything else in short order. And think what that unlimited power means! All the power we want power enough even to try out such hitherto purely theoretical possibilities as the neutralization of gravity, and even of the inertia of matter!" "Hold on!" protested Samms.

His son is called Swana, who is the generator of all diseases; he inflicts severe sufferings on people for which they cry aloud, and moves in the intelligence of the whole universe. The fire, which is known as the internal heat by which the food of all creatures is digested, is the fourth son of Vrihaspati known through all the worlds, O Bharata, by the name of Viswabhuk.

The complete weight of such an apparatus is 40 pounds; the electric generator, which is no larger than the motor used for driving the ordinary table ventilating fan, accounts for 16 pounds of this total. Under test at sea, upon the deck of a ship, a range of 250 miles has been obtained.

The current from a generator flows through the primary coil of the transformer and the alternations of the usual lighting current is 60 cycles per second.

The airship was going down rapidly, but it was the work of but a moment to start the generator, and then the earthward motion was checked. "We'll have to take our chance of being blown to France," remarked Tom, as he went over to look at the broken electrical machinery. "But we ought to fetch the coast by morning with this wind. Lucky it's blowing our way."