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Updated: June 11, 2025
The cork covering the carbons forms a dome. Any good telephone receiver when used in connection with this microphone, reproduces articulate speech with remarkable distinctness, especially hissing sounds, and with a loud and full tone. A description of this microphone was published in La Lumiere Electrique, of 15th April, 1882, and a drawing thereof on 29th April of same year.
Two cable-guards are in front of us; in front of them the chasm; and across the chasm lies Les Errues whither the aviator has gone and where, I do not doubt, are plenty more of his kind. "This, and two carbons, I shall endeavour to send by pigeon. In extremity we shall destroy all our papers and identification cards and get what Huns we can, RESERVING FOR OUR OWN USES one cartridge apiece.
To him it was sheer romance to parade through town with a tin haversack of carbons for the arc-lights, familiarly lowering the high-hung mysterious lamps, while his plodding acquaintances "clerked" in stores on Saturdays, or tended furnaces. Sometimes he donned the virile and noisy uniform of an electrician: army gauntlets, a coil of wire, pole-climbers strapped to his legs.
The three bulbs were suspended from a straight bare wire connected to a terminal of the coil, the largest bulb being placed at the end of the wire, at some distance from it the smallest bulb, and an equal distance from the latter the middle-sized one. The carbons glowed then in both the larger bulbs about as expected, but the smallest did not get its share by far.
All the above named scientific men agree that variations of a current passing through a carbon microphone are produced by pressure of the carbons against one another, and they also agree that a jolting motion could not be relied upon to reproduce articulate speech. Mr.
By converging an image of the sun upon a voltaic arc, and thus obtaining the spectra of both sun and arc superposed, he found that the two bright lines which, owing to the presence of a little sodium in the carbons or in the air, are seen in the spectrum of the arc, coincide with the dark lines D of the solar spectrum.
As a result of the peculiar arrangement of this lantern, the lamp is constantly surrounded with a certain quantity of air that would certainly suffice to consume the carbons in case of a breakage of the globe without allowing any lighted particles to escape to the exterior.
Eight forms of electric lamps using infusible earthy oxides and brought to high incandescence in vacuo by high potential current of several thousand volts; same character as impingement of X-rays on object in bulb. A loud-speaking telephone with quartz cylinder and beam of ultra-violet light. Four forms of arc light with special carbons. A thermostatic motor.
An accident of the moment the exhaustion of the carbons of the electric lamps gave to his exit a still keener dramatic intensity.
There exist however, some indications that experiments on the production of the electric spark between carbons had been performed before the above named date. Mr. He has just mounted metallic piles to the number of 2,500 zinc plates and as many of rosette copper. We shall forthwith speak of his results, as well as of a new experiment that he performed yesterday with two glowing carbons.
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