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Leaves (Branchlets).

— Mr. P.J. Holdsworth has made some interesting experiments on the essential oil from the foliage of the White Pine. In one experiment he obtained 1/4 fluid ounce from 6.5 lb. of fresh leaves, and it seems desirable that his experiments should be followed up with the view to ascertain the composition of this oil, as, so far as I know, he is the first to extract oil from these leaves.

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