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Updated: June 10, 2025
Further on he came upon an olive-green, regularly-marked snake, which seemed in no hurry to escape; another slightly-formed reptile, nearly equal in thickness all along, and looking as if made of oxidised silver, being far more active in its movements to gain sanctuary under a furze bush.
The butter and sugar of milk are given out in the form of carbonic acid and water, and their conversion into oxidised products furnishes the clearest proof that far more oxygen is absorbed than is required to convert the carbon and hydrogen of the metamorphosed tissues into carbonic acid and water.
The first effect of starvation is the disappearance of fat, and this fat cannot be traced either in the urine or in the scanty faeces. Its carbon and hydrogen have been given off through the skin and lungs in the form of oxidised products; it is obvious that they have served to support respiration.
The only remaining difficulty that I had to surmount was the risk of defects in the surface of the speculum. These sometimes result from the first splash of the melted metal as it is poured into the ring mould. The globules sometimes got oxidised before they became incorporated with the main body of the inflowing molten alloy: and dingy spots in the otherwise brilliant alloy were thus produced.
The king was seated on a throne of the most splendid workmanship; the precious metal had been oxidised to every shade of colour, and was wrought in beautiful mosaic: the walls and ceiling were entirely covered with the same, in some parts burnished, to reflect as mirrors, in others elaborately carved in ornamental fretwork, as peculiar from the elegance of its design, as from the superiority of its execution.
What is left is either iron oxide, "gossan," or the oxides of the other metals. Even lead can thus be oxidised, but requires more care as it melts nearly as readily as antimony and is much less volatile. The oxides in the thoroughly roasted ore will not amalgamate with mercury, and are not acted on by chlorine or cyanogen.
Meanwhile there is a gradual wasting away of the pyrites or positive pole, its sulphur being oxidised to sulphuric acid and its iron to sesquioxide of iron, or hematite, a substance very generally associated with gold nuggets.
These plants were built almost entirely for war purposes, for the production of ammonia to be oxidised to nitric acid. Ammonium nitrate also resulted. These substances are the mainstay of explosives warfare, and, as a matter of fact, their production in these very plants was the chief factor which enabled Germany to continue the war beyond 1915.
Over the rock which forms the main body of the hill lie the usual red clay and oxidised quartz gravels, which, if treated by hydraulic mining, ought, as it contains gold, to prove a paying stuff: moreover washing off the surface-dirt would lay bare the rock and render all after-work easy and simple.
No appreciable effect follows the mere contact of air with sulphur particles at atmospheric temperature; but if the particles be raised to a temperature of 500 degrees Fahr., the sulphur is oxidised to the gaseous sulphur dioxide.
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