Word: electroal
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...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...
Physical Colloquium. Recent Optical Experiments with Electro-magnetic Waves. Mr. A. W. K. Billings. Jefferson Physical Laboratory, Room...
Physical Colloquium. Recent Optical Experiments with Electro-magnetic Waves. Mr. A. W. K. Billings. Jefferson Physical Laboratory, Room...
...building is ventilated by fans that force in air of a constant temperature, and exhaust the old. The building is lighted throughout by electricity, and power is furnished in the laboratories for use in any kind of electro-chemical work...
...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...