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In pre-modern chemistry and alchemy, cohobation was the process of repeated distillation of the same matter, with the liquid drawn from it; that liquid being poured again and again upon the matter left at the bottom of the vessel. Cohobation is a kind of ''circulation'', only differing from it in this, that the liquid is drawn off in cohobation, as in common distillation, and thrown back again; whereas in circulation, it rises and falls in the same vessel, without ever being drawn out. ==References== * * *"Cohobate"; "Cohobation". ''Oxford English Dictionary''. Oxford University Press. 2nd ed. 1989. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cohobation」の詳細全文を読む スポンサード リンク
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