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METHOD Or OBTAINING MANGANESE.

water, filter it, and decompose it by the addition of potash;collect the precipitate, form it into a paste with oil, and put itinto a crucible, well lined with charcoal. Expose the cruciblefor at least two hours to the strongest heat of a forge.

Manganese may also be obtained in the following manner :

Prepare a saturated solution of sulphate of manganese, bring itto a boiling heat, and add to it, gradually, a solution of tartrite ofpotash, until no further precipitate ensues; then filter thesolution, and wash the precipitate in water, and when dry,make it into a paste with oil, and proceed as before.

Rati on ale... The sulphuric acid unites to the potash, andforms sulphate of potash, and the tartareous acid joins to themanganese, and forms a tartrite of manganese, which is decom-posable by heat.