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Updated: May 13, 2025
Thus, for example, manganese is slowly deposited from an ammoniacal solution, when it is permitted to take up oxygen from the air, as hydrated sesquioxide, and from neutral or alkaline solutions, as hydrated peroxide on the addition of chlorine, bromine, or chameleon solution.
Hence, the ferridcyanide of potassium is as excellent a test for protoxide of iron as the yellow ferrocyanide is for the sesquioxide. E., Photo. Times. The illuminating gas and hydrogen apparatus, illustrated herewith, is adapted to all cases in which it is desirable to manufacture gas upon a small scale.
The green color, which was the most common, is an impure carbonate of copper, the same as that with which pahos are painted for ceremonial use today. Several shallow, saucer-like vessels contained yellow ocher, and others sesquioxide of iron, which afforded both the ancients and the moderns the red pigment called cuta, an especial favorite of the warrior societies.
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