Page:The Oak.djvu/181

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The Oak (Marshall Ward) Fig 48.jpg

Fig. 48.—Transverse section of oak-timber destroyed by Polyporus sulphureus. (R. Hartig.)

The Oak (Marshall Ward) Fig 49.jpg

Fig. 49.—Highly magnified longitudinal radial section of a piece of oak destroyed by a timber fungus, showing the ravages of the hyphæ in the various tissues. (R. Hartig.)