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Transverse sections of spruce taken at the 1.3-m level. A, Fresh state (width 2,636, center −293); B, after oven drying (width 1,190, center −581) to achieve an image without water of the same disc. Density profiles were measured across the discs showing reduced densities in the heartwood of the fresh state (A) and earlywood-latewood differences within each growing ring (B).
