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Updated: June 10, 2025
Both saccharine and fatty matters are eventually oxidised in the body; and there is an accompanying evolution of heat. Sugar is the form to which sundry other compounds have to be reduced before they are available as heat-making food; and this formation of sugar is carried on in the body.
The same foods, oxidised within the body, yield approximately the same amount of energy. There is, therefore, an equivalence, a balance, between income and outgo of energy: so that the recently conducted experiments in calorimetry are held to prove beyond question the causation of vital energy by food.
This is not the place to discuss the physiological intricacies involved, and I can only refer those interested to the work in question. The facts upon which the current theory is founded are well known, and, apparently, thoroughly established. Briefly, they are these: So much food, oxidised or burned outside the body, can be shown to yield so much heat and energy.
"This sample came from the lode at the 140 ft. level, whilst samples from the higher levels where the ore is more oxidised, although carrying the gold in exactly the same degree of fineness, do not give as high a percentage of auric sulphide.
Where the ore contains any considerable quantity of silver which should be saved, the addition of the salt is necessary as the silver is very liable to become so oxidised in the process of roasting as to render its after treatment almost impossible.
They are simple things, but mostly made expressly for him, of oxidised silver, with his initials in plain block letters; and each object has a neat sole leather case of its own, so that they can be thrown pell-mell into a bag and jumbled up together without being scratched.
And then, of course, he fell in love with her, for she leaned on his piano and improvised flatteries across the strings to him and turned full on him the luminous midnight of her ox-eyed beauty. A punster would say that he was oxidised, at once. The two lovers were strangely unlike of course.
The solution is made up to its former strength and passed again through fresh tailings. When the tailings contain a quantity of decomposed pyrites, partly oxidised, the acidity caused by the freed sulphuric acid requires to be neutralised by an alkali, caustic soda being usually employed. When "cleaning up," the cyanide solution in the zinc precipitating boxes is replaced by clean water.
This leaves a superficial film which is metallised by dipping in a solution of 20 grains of nitrate of silver to a pint of water. On this metallic film a thicker layer of gold and silver in different shades can be deposited by the current, and the silver surface may also be "oxidised" by washing it in a weak solution of platinum chloride.
Though not so gaudy or at first so striking, these pearl-greys, and silvers, and delicate interweaving of tints are really as wonderful, being graduated and laid on with a touch no camel's hair can approach. Sometimes, again, the sunset shows a burnished sky, like the surface of old copper burnt or oxidised the copper tinted with rose, or with rose and violet.
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