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The Diathermancy of Ebonite, by some incomprehensible process, drove her bewildered mind back on her old companion. "I want to give Teresa a little pleasure before we part," she said timidly; "may she go with us?" "Of course!" cried Mrs. Gallilee. "And, now I think of it, why shouldn't the children have a little pleasure too? I will give them a holiday.
When he uses tin-foil electrodes on the outside of the bulb, he protects the tin-foil edges, and, what is more essential, uses extremely small Leyden jars and a short spark gap between the poles of the discharging rods. From a photograph by Professor Arthur W. Wright of Yale College, taken through an ebonite plate-holder with fifty-five minutes exposure.
Graham Bell in the last few months have shown that even ebonite, one of the most opaque insulators to ordinary vision, is certainly transparent to some kinds of radiation, and transparent to no small degree.
Water, on the other hand, is a partial conductor, and a great enemy to the storage or conveyance of electricity, from its habit of soaking into porous metals, or depositing in a film of dew on the cold surfaces of insulators such as glass, porcelain, or ebonite. The remedy is to exclude it, or keep the insulators warm and dry, or coat them with shellac varnish, wax, or paraffin.
For drying substances which act on copper the basket may be made of platinum or ebonite; in the latter case, owing to the increased size of the perforations, it may be necessary to line the basket with platinum wire gauze or perforated parchment paper. The experiments of M. Marcel Deprez have entered on a decisive phase.
H is an ebonite tube that incloses and protects the induction bobbin, K, whose induced wire communicates on the one hand with the brass tube, L, and on the other with an insulated central conductor, M, which terminates at a point very near the extremity of the brass tube.
We took twenty pairs of ski, all of the finest hickory; they were 8 feet long, and proportionately narrow. I chose them of this length with a view to being able to cross the numerous cracks in the glaciers; the greater the surface over which the weight could be distributed, the better prospect we should have of slipping over the snow-bridges. We had forty ski-poles, with ebonite points.
The voltameters in which this second operation is performed have likewise been modified. These are hermetically closed by an ebonite cover through which pass the tubes, B' C' and B C, that allow the liquid, E+E-E'+E', to circulate. The current of spirits is regulated at the entrance by the cock, R, which, through its division plate, gives the exact discharge per hour.
Some bodies, such as flesh, paper, wood, ebonite, or vulcanised fibre, thin sheets of metal, and so on, are more or less transparent, and others, such as bones, carbon, quartz, thick plates of metal, are more or less opaque to the rays. The human hand, for example, consisting of flesh and bones, allows the rays to pass easily through the flesh, but not through the bones.
The siphon and reservoir are together supported by an EBONITE bracket, separate from the rest of the instrument, and INSULATED from it; that is to say, electricity cannot escape from them to the instrument.
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