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REFERENCES

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    Kidd, F. Laboratory Experiments on the Sprouting of Potatoes in various Gas Mixtures. New Phytologist, XVIII, p. 248, 1919.
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    Small, J. A Theory of Geotropism. New Phytologist, XIX, p. 49, 1920.
  • 3
    Fitting, H. Untersuchungen über geotropischen Reizvorgange Jahrbuch. F. wiss. Botanik, XLI, Teil I, p. 282. 1905.
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    Newcombe, F. C. Geotropic response at various angles of inclination. Ann. Bot. XIX, p. 311, 1905.
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    Small, J. Changes of Electrical Conductivity under Geotropic Stimulation. Proc. Roy. Soc. Lond. B, 90, p. 349. 1918.
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    Church, A. H. On the Interpretation of Phenomena of Phyllotaxis. Oxford Bot. Mem., No. 6, 1920.
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    Cook, T. A. The Curves of Life. Constable, London, 1914.