Energy content per air dried full cord

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Energy content per air dried full cord, in 000s of BTUs. The hardest species are at the top of the list.
Rock Elm Shagbark Hickory White Oak Bitternut Hickory Sugar Maple Beech Red Oak Yellow Birch Red Elm White Ash White Elm Red Maple Tamarack Black Cherry White Birch Black Ash Green Ash Silver Maple Manitoba Maple Large Tooth Aspen Hemlock Trembling Aspen Butternut Balsam Poplar White Pine Basswood White Cedar White Spruce Balsam Fir	32,000 30,600 30,600 29,200 29,000 27,800 27,300 26,200 25,400 25,000 24,500 24,000 24,000 23,500 23,400 22,600 22,100 21,700 19,300 18,200 17,900 17,700 17,400 17,260 17,100 17,000 16,300 16,200 15,500