A practical course in botany : with especial reference to its bearings on agriculture, economics, and sanitation . Fig. 140. — Sections of sycamore wood : a, tangential; h, radial;c, cross. {From Pinchot, U. S. Dept. of Agr.)


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Keywords: ., bookcentury1900, bookdecade1910, bookpublisher, booksubjectplants