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There is thus precipitated on the fibre manganous hydrate, which by a short passage into a cold dilute solution of bleaching powder is oxidized and converted into the brown manganic hydrate.

Cotton is dyed by first impregnating it with a solution of manganous chloride, then dyeing and passing into a hot solution of caustic soda.

In barytobiotite and manganophyllite the magnesia is partly replaced by baryta and manganous oxide respectively.

Manganese takes the sulfur away from the iron and the manganous sulfide which is formed collects in small globules throughout the metal without weakening it.

The ferrous oxide is in part replaced by manganous oxide and lime, and in the closely allied and isomorphous species eosphorite manganese predominates over iron.