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This figure shows an image of a cross section of wood. The grain runs in small arcs lengthwise in the image, with small fractures occurring near the mid point of the photograph.
This figure shows a cross section of wood magnified. The upper half of the image shows clusters of small circles, looking considerably like cells or a honeycomb. The lower half of the image shows a variety of streaks running lengthwise in the image.
FHWA-HRT-05-096
