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Let me first deal with the radiant electrode hypothesis. Some metals, it is well known, such as silver, gold or platinum, when used for the negative electrode in a vacuum tube, volatilize more or less rapidly, coating any object in their neighborhood with a very even film. On this depends the well known method of electrically preparing small mirrors, etc.
Through the beds of schist, coloured with delicate shades of green, ran in winding course threads of copper and manganese, with traces of platinum and gold. I thought, what riches are here buried at an unapproachable depth in the earth, hidden for ever from the covetous eyes of the human race!
We can, of course, burn away this iron by giving plenty of air to it; but with the bodies which Deville wants to expose to this intense heat he has not that means: the gas itself must have power enough to drive off the slag which forms on the surface of the metal, and power to impinge upon the platinum so as to get the full contact that he wants for the fusion to take place.
The production of acetic acid from alcohol is a simple oxidation. The equation C2H6O + O2 = C2H4O2 + H2O shows the chemical change that occurs. This oxidation can be brought about by purely chemical means. While alcohol will not readily unite with oxygen under common conditions, if the alcohol is allowed to pass over a bit of platinum sponge the union readily occurs and acetic acid results.
He smiled a superior masculine smile that drew his customer within the informed brotherhood. "Now here, there's a platinum little thing that costs seven hundred and fifty, and this one you like will keep just as good time as that one that costs six hundred more. What could be fairer than that?" "All right," said the customer. "I'll take it."
To do this, the small globule of special glass is fused on the platinum wire at the proper point and the tube into which the wire is to be sealed is heated and a small tail drawn out at the point where the wire is to be inserted. There are now two ways of sealing in the wire.
We learnt a little later that he was a harmless lunatic, who went about the world with successive concessions for ruby mines and platinum reefs, because he had been ruined and driven mad by speculations in the two, and now recouped himself by imaginary grants in Burmah and Brazil, or anywhere else that turned up handy. And his eyebrows, after all, were of Nature's handicraft.
If the leading nations would agree upon a fixed value for platinum, it might be used like gold as a medium of exchange. Silver is brighter and more attractive than platinum, but is of little use in the laboratory. It has been found in recent years to be so much more abundant than gold that its value has decreased greatly as a commercial article.
Without paying further attention to it, he turned and, bending down, lifted the girl without an effort off her feet and carried her across the room to the Chesterfield, upon which he laid her at full length. Then he seized her muff, which dangled from her neck by a thin platinum chain. Suddenly he heard the door behind him creak.
This water of sulphur is then carefully collected, and distilled in a boiler of platinum, on which sulphur can not act. The sulphuric acid obtained by this distillation is used to separate the gold that is found in the silver bars from silver. This sometimes amounts to ten per cent. The acid dissolves the silver, but does not act upon the gold, which is thus separated from the silver.
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