Smithsonian miscellaneous collections . ments in which carbon dioxide is used as an aerial fertilizer are ofimportant scientific value, the practical application of this type offertilizer in commercial work is far from being satisfactory, althoughits application to greenhouse culture appears to be most promising. REFERENCES (i) Arthur, John M., Guthrie, John D., and Newell, John Some effects of artificial climates on the growth and chemical composi-tion of plants. Amer. Journ. Bot., vol. 17, pp. 416-482. (2) CuMMiNGs, M. B., and Jones, C. H. 1918. The aerial fertilization of plants wit


Smithsonian miscellaneous collections . ments in which carbon dioxide is used as an aerial fertilizer are ofimportant scientific value, the practical application of this type offertilizer in commercial work is far from being satisfactory, althoughits application to greenhouse culture appears to be most promising. REFERENCES (i) Arthur, John M., Guthrie, John D., and Newell, John Some effects of artificial climates on the growth and chemical composi-tion of plants. Amer. Journ. Bot., vol. 17, pp. 416-482. (2) CuMMiNGs, M. B., and Jones, C. H. 1918. The aerial fertilization of plants with carbon dioxide. Vermont Stat. Bull. 211, pp. 1-56. (3) Hoover, W. H., Johnston, Earl S., and Brackett, F. S. 1933- Carbon dioxide assimilation in a higher plant. Smithsonian Misc. Coll.,vol. 87, no. 16, pp. 1-19. (4) Owen, Owen. 1923. Carbon dioxide investigations. Exp. and Res. Sta., Nursery and MarketGarden Industries Development Soc, Ltd., 9th Ann. Rep., pp. 82-94. SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 94, NO. 15, PL. WHEAT Cultures Enclosed in Transparent Cylinders ofCellulose Acetate


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