- oakbark
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Some kinds of fish oils are similarly improved by vigorous agitation with oakbark infusion or other liquors containing tannin, conveniently effected by blowing a rapid current of steam through the whole: [...]
Wikipedia foundation.
Some kinds of fish oils are similarly improved by vigorous agitation with oakbark infusion or other liquors containing tannin, conveniently effected by blowing a rapid current of steam through the whole: [...]
Wikipedia foundation.