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 50 turpentine location DHJanzen100288.jpg high resolution
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| The butt ends of these newly cut Michigan white pine logs show clearly the part of the tree trunk that is rich in resin vessels with liquid terpenes (resins, one of which is turpentine); it appears to be the outer part of the sapwood. As the tree grows in diameter, the functional part of this defense system moves outward as well, but some of the resin stays in the wood. Why do the stripes of flowing/dripping resin go in different directions on these logs? | ||
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