The Notebooks of Leonardo Da Vinci

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Page 630 of 1565.
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TO REMOVE THE SMELL OF OIL.

Take the rank oil and put ten pints into a jar and make a mark on
the jar at the height of the oil; then add to it a pint of vinegar
and make it boil till the oil has sunk to the level of the mark and
thus you will be certain that the oil is returned to its original
quantity and the vinegar will have gone off in vapour, carrying with
it the evil smell; and I believe you may do the same with nut oil or
any other oil that smells badly.

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