extraction of natural resin from pine tree trunks - europe - po

amber aroma balm balsam bark carving chart collector conifeous conifers cutting distillate distilling essence essential europe extraction fir fragrant graph graphic gum harvesting injury insoluble jar larch leather liquid lymph oils paint pine pines plant portugal ragia resin rubber sap scent secretion solvent spruce sticky substance tannin tanning therapy tree trend trunk turpentine