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REFERENCES

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    Blackman, V. H. Theory of Geotropic Response. New Phytologist, 20, p. 38. 1921.
  • 2
    Coupin. Sur une tige à géotropisme horizontal. Compt. rend. Acad. Sciences, Paris , 172, p. 608. 1921.
  • 3
    Lynn, M. J. The Reversal of Geotropic Response in the Stem. The Effect of Various Percentages of Carbon Dioxide. New Phytologist, 20, p. 116 1921.
  • 4
    Small, James. A Theory of Geotropism with some Experiments on the Chemical Reversal of Geotropic Response in Stem and Root. New Phytologist, 19, p. 49. 1920.
  • 5
    Small, James and Lynn, M. J. II. On the Angle of Balance of Roots, Stems, and Leaves. New Phytologist, 19, p. 209. 1920.
  • 6
    Small, James and Rea, M. W. Preliminary Notes on Additional Evidence for the Hydrion Differentiation Theory of Geotropism. I. On the Reversal of Geotropic Curvature in the Stem. New Phytologist, 19, p. 208. 1920.
  • 7
    Snow, R. The Hydrion Theory of Geotropism. New Phytologist, 20, p. 247. 1921.