. The microscope and its revelations. Km. 550.—Transverse section of afossil wood, showing the medullaryrays, l:itcs of woody structure (a a), whose thickness is often lessthan their own ; whilst in the tangential section (fig. 553) the cut.

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901