The rubber tree book . 151 - r_-m-im :^^?l z^(fc^ XT MR. Diagram of Cross-section through Untapped Stem (Outer Part)?of a Six-year-old Hevea. (Magnified 12 times.) B, Barkproper. St, Groups of hardened cells in cortex. MR,Layers of laticiferous vessels in cortex. C, Cambium. G,Some of water-conducting vessels in wood.

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Keywords: ., bookcentury1900, bookdecade1910, bookidrubbertreebo, bookyear1913