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Updated: May 31, 2025
We are to have the apparatus, which illustrates the conversion of radiant energy into sonorous vibrations. Have you ever heard, my dear, of the Diathermancy of Ebonite? Not in your way, perhaps?" Carmina looked as unintelligent as Zo herself. Mrs. Gallilee's science seemed to frighten her.
The Röntgen rays will doubtless traverse the board, and shadows will be formed upon the plate, but there will be an uncertainty or dimness of outline that will render the results unsatisfactory. It is for this reason that Professor Wright has taken most of his shadow pictures through only the thickness of ebonite in his plate-holder.
Finally, upon this second ebonite plate there was placed another photographic plate, with its sensitized film upward and directly in contact with an upper metallic disk, and connected with the positive pole of the coil by the conductor, L. An inspection of Figs. 2 and 3 shows that the, efflux does not possess the same form at the two poles.
Doctor Frederick Rodebush sat at the control panel of Triplanetary's newly reconstructed space-ship, his hands grasping the gleaming, ebonite handles of two double-throw switches. Facing the unknown though the physicist was, yet he grinned whimsically at his friend. "Something, whatever it is, is about to take place. The Boise is taking off, under full neutralization.
It will be seen that to increase the thickness of the sheet of lead merely augments the duration of the accumulator, without affecting its capacity or its manner of charging and discharging. Nos. 1, 2, 3, and 4 may be placed in vessels of stoneware, glass, or ebonite, or in boxes of pitch pine, painted with three coats of gum lac and lined with sheet lead.
In the top of the case, as well as in the two sides, AD and BC, are apertures that are closed by ebonite cylinders through which slide, with slight friction, copper rods, HLN. In the leg of the table there is a copper rack which may be maneuvered from the interior by a pinion, and which communicates electrically with a terminal, E. The upper part of this rack, which enters the glass case, is threaded, so that there may be affixed to it either a metallic or an insulating disk.
Another form of microphone is made as follows: Two blocks of gas carbon, C, B, each about one and a half inches long and one inch square, having each a circular hole one and a quarter inches deep and half inch in diameter; these two blocks are embedded in a block of cork, C, about one-quarter of an inch apart, these holes facing each other, each block forming a terminal of the battery and induction coil; a pencil of carbon, C, P, about three-eighths of an inch in diameter, and two inches long, having a ring of ebonite, V, fixed around its center, is placed in the holes of the two fixed blocks; the ebonite ring fitting loosely in between the two blocks so as to prevent the pencil from touching the bottom of the holes in the blocks.
A more remarkable picture is one taken in the same way, but with a somewhat longer exposure of a rabbit laid upon the ebonite plate, and so successfully pierced with the Röntgen rays that not only the bones of the body show plainly, but also the six grains of shot with which the animal was killed.
The platinoid wire is insulated and the covering of silk that insulates it is wound on the ebonite bobbins just where my finger is. If it were wound single an extra current would be induced in the coils. The bobbins are saturated in hot paraffin wax... A sharp Ulster voice said from the bench below Stephen: Are we likely to be asked questions on applied science?
It consists, as shown in figure 8, of a metal plate B having an insulating handle of glass H, and a flat cake of resin or ebonite R. If the resin is laid on a table and briskly rubbed with cat's fur it becomes negatively electrified. The brass plate is then lifted by the handle and laid upon the cake. It touches the electrified surface at a few points, takes a minute charge from these by contact.
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