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She was a changeling of a girl, veering from gayety to shyness.... Her gaze was now on her wrist watch, a slender blaze of platinum and diamonds. "The present yes," she said in a muffled little voice. He bent his head to hear her through the veil. A tormenting curiosity was assailing him.
It is almost needless to remark that the disk, D, and the pin, E, are composed of insulating material, such as vulcanite. Jour. Gas Lighting. By J.W. PRATT, F.C.S. It frequently happens in the laboratory that platinum vessels, after long-continued use, begin to show signs of wear, and become perforated with minute pinholes.
For holding the splinter of mineral, which should well represent the mass and be quite small, is a three-inch length of platinum wire of the thickness of a cambric-needle; this may be bought for about ten cents at the apparatus shop. Sometimes a mineral has to be fused with borax, as I mention further on in my tables.
The electrolysis is best effected in the presence of a sufficient quantity of ammonium oxalate; no separation of any iron compound takes place. The iron is deposited in the form of a bright, steel gray, firmly-adhering mass on the platinum dish. The iron may be exposed to the air for several days without any noticeable oxidation taking place.
This separation presents considerable difficulty, because the metal is not precipitated as a compact mass on the platinum. The bismuth is always obtained in the same form, no matter whether it is precipitated from an acid solution, or from the double ammonium oxalate, or, finally, from a solution to which potassium tartrate has been added.
Another of his early transmitters was a rough model of the human ear, carved in oak, and provided with a drum which actuated a bent and pivoted lever of platinum, making it open and close a springy contact of platinum foil in the metallic circuit of the current.
The effect of this is to break the platinum contact at C, and so interrupt the circuit of an alarm-bell placed in any suitable position. Suppose the water ceases to flow; the spring, F, comes into play, contact is made at C, and the bell continues to ring till some one comes to stop it.
When to the honey-pot of wealth is added the lure of beauty, how can one be sure that any proffered love is free from the taint of greed? Her brother was one of America's most brilliant money-getters. He gathered in and disbursed with a lavish magnificence. She had been called the most beautiful woman in Europe and her gem-like brilliancy had been set in Life's gold and platinum of environment.
I happened to speak of Mrs. Brindlecombe's pin, the wonderful one I just wrote about. The very next day Galusha came trotting in, bubbling over with mischief and mystery like the boy he is in so many things, and handed me a jeweler's box. When I opened it there was a platinum brooch with a diamond in it as big honestly, Lulie, I believe it was as big as my thumbnail, or two thirds as big, anyway.
"Our firm," he said, "practically does all the platinum business of this country, and the demand for the material is so great that we never can get more than we want of it. The principal portion, or, in fact, nearly all of it, comes from the famous mines of the Demidoff family, who have the monopoly of the production in Russia.
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