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Updated: June 11, 2025
The precipitate formed is transferred to the filter and well washed with water containing NH Cl and NH O, then dissolved in hydrochloric acid and reprecipitated with ammonia, filtering and washing as before. It is again dissolved in HCl and titrated with uranium solution, or decomposed by tin, as noted below, and the manganese precipitated as binoxide with chlorine, and determined.
It has to be kept under some liquid, such as kerosene, which contains no oxygen. Pour strong hydrochloric acid on a little manganese dioxide in a test tube, and warm gently over a low flame. The escaping gas is chlorine. Avoid breathing much of it.
Then to stem the tide of her impending protest, he broke his studious silence. "I'm looking for molybdenum," he went on quickly, "and some of these other rare metals that are in demand on account of the war. Ever find any vanadium or manganese around here? No, I guess they're all further north." He returned to his meal and the Widow surveyed him appraisingly with her bold, inquisitive eyes.
Indeed, the amount of exportation of live stock from this part of the Highlands to the Western continent, has more than once attracted the attention of Parliament. The Manufactures are large and comprehensive, and include the most famous distilleries in the world. The Minerals are most abundant, and amongst these may be reckoned quartz, porphyry, felspar, malachite, manganese, and basalt.
I went down it, and, under the guidance of some Cornish miners, I had a try with a pick and succeeded in getting out several nuggets as thick as my little finger. As the vein was principally manganese, we were black all over when we came out of the mine, but a body of negresses came at once to wash us.
It consists of brown and yellow crystals of quartz, and is much admired for seal stones, &c.; it is sometimes improperly termed topaz. Why is quartz the constituent of so many gems? Because the tinges it receives from metals are sufficient to produce these varieties. Thus, amethyst, or purple quartz, is tinged with a little iron and manganese.
The solutions should be protected from light and heat as far as possible, since both induce decomposition with a deposition of manganese dioxide, and it has been shown that decomposition proceeds with considerable rapidity, with the evolution of oxygen, after the dioxide has begun to form.
Wakabayashi's business interests ranged from taking pictures of the Canal in specially chartered planes, to negotiating for manganese deposits and attempting to establish an "experimental station to grow cotton in Costa Rica." The big manganese-and-cotton-photographer man fluttered all over Central and South America, always with his camera.
The mud of the Nile, which is the sediment of the matters which the river holds suspended, is destitute of manganese; but it contains, according to the analysis of M. Regnault, six parts in a hundred of oxide of iron; and its colour, at first black, changes to yellowish brown by desiccation and the contact of air. The mud consequently is not the cause of the black crusts on the rocks of Syene.
With the other half I continued my series of experiments, and reduced it in successive stages through all the long series of metals, through silver and zinc and manganese, until I brought it to lithium, which is the lightest of all." "And what did it turn to then?" asked Robert. "Then came what to chemists is likely to be the most interesting portion of my discovery.
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