. Elementary principles of agriculture : a text book for the common schools . Fig. 14. A, a young root of the pea marked with fine lines of water- proof ink into 13 spaces. B, the same root, 24 hours later, showing elongation only in terminal 5 spaces. The rate of growth is greatest in the second and third spaces and slow in the first, fourth and fifth. Magnified 2 diam. C, tip of root greatly magnified and shown in section . to, root-cap; i, younger part of cap; z, dead cells separating from cap; s, growing point; p, central cylinder.

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Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear