Word: coiled
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Physical Colloquium. Lord Rayleigh on the Induction Coil. Mr. G. A. Anderegg. Jefferson Physical Laboratory...
...this time photographs have been obtained by Holt's machine, or by the induction coil, but Professor Trowbridge has just taken a photograph with his new apparatus which gives a clearer outline of the bones of the hand than any yet taken. This is the first photograph ever taken by means of a battery...
...future of the method seems to lie in the application of currents of high frequency and very great electromotive force, such as one obtains by the use of the Thomson or Tesla coil and by the use of only one terminal. In this way the breakage of the tubes can be prevented...
...more than a large receiver of air from which the air can be exhausted. In order to get the rays, however, you must push the exhaustion only to a certain point. Now instead of using the 10,000 cells already mentioned to produce the pale blue flame, a Ruhmkoff coil is introduced, which makes it possible to get a high electro-motive force...
...Ruhmkoff coil consists of two coils; one inside called the primary which is a piece of wire only a few feet long; another on the outside called the secondary which is about a mile long. By passing a strong current through the shorter wire and breaking the current a great electric stress and a high force is obtained. Approximately the 10,000 cells would produce 10,000 volts but the three Ruhmkoff coils used in the experiments last night produced approximately 50,000 volts...