Smithsonian miscellaneous collections . y, H. L. 1929. Influence of light intensity and light quality upon the growth ofplants. Contr. Boyce Thompson Inst. Plant Res., Inc., vol. 2, no. 3,pp. 159-195-1935. Light as an ecological factor and its measurement. Bot. Rev., vol. i,no. 9, pp. , E. C. 1899. Influence des diverses radiations lumineuses sur la forme et la struc-ture des plantes. Ann. Sci. Nat. Ser. Bot., ser. 8, vol. 10, pp. Observations sur la croissance des plantes aux lumieres de diverses longueurs donde. Ann. Sci. Nat. Ser. Bot., vol. 11, pp.

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Smithsonian miscellaneous collections . y, H. L. 1929. Influence of light intensity and light quality upon the growth ofplants. Contr. Boyce Thompson Inst. Plant Res., Inc., vol. 2, no. 3,pp. 159-195-1935. Light as an ecological factor and its measurement. Bot. Rev., vol. i,no. 9, pp. , E. C. 1899. Influence des diverses radiations lumineuses sur la forme et la struc-ture des plantes. Ann. Sci. Nat. Ser. Bot., ser. 8, vol. 10, pp. Observations sur la croissance des plantes aux lumieres de diverses longueurs donde. Ann. Sci. Nat. Ser. Bot., vol. 11, pp. Le developpement des algues et la refrangibilite de la lumiere. Bot., vol. 46, pp. 65-74, , Otto, and Negelein, Erwin 1923. tjber den Einfluss der Wellenlange auf den Energieumsatz bei derKohlensaureassiniilation. Zeitschr. Phys. Chem., vol. 106, pp. , Julius 1874. Untersuchungen uber die Beziehungen des Lichtes zum Math. Nat. K. K. Akad. Wiss., vol. 69, Abt. i, pp. < < 52 J D0 I 0 X ?^ 0 liJIE h d:0

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