The White Pine (Pinus strobus Linnaeus) . od X 21)0, showing a (evr of the thick-walloil tiaclnids of the summer woml followed by the large thin-walled ones of llio succeeding spring, both crossed by a medullary ray. The liordered ]iits of tlio outer cells of the ray, shown both in section and surface view, are in strong luiitrast with tho simple jiits of tho inner Tangential section of wood X Cross section of jiart of twig colleiteil May 20, l!r. .1. .Schroeder, lias llol/ ilir Conifcreii, BuMelin No. 22, Div. of Foresuy, U. S Dept. of Aeiiculture Plate

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Keywords: ., book, bookcentury1800, bookdecade1890, bookpublisherwashingtongpo