Abstract
THE report of the Smithsonian Institution for the year ending June 30, 1940, includes the report of the secretary, the financial report of the executive committee of the Board of Regents, together with Teports on the United States National Museum, the National Gallery of Art, the National Collection of Fine Arts,the Freer Gallery of Art, the Bureau of American Entomology, the International Exchange Service, the National Zoological Park, the Astrophysical Observatory and the Division of Radiation and Organisms. The last-named refers to further work on the problems of photosynthesis and factors affecting plant growth both from a nutritional and radiation point of view. Many measurements have been made of the rate of carbon dioxide uptake and the intensity of fluorescence during the induction period of photosynthesis, and respiration and chlorophyll studies have been continued with a recording spectrographic carbon dioxide apparatus. A standardized technique has been worked out for the extraction of plant growth substances from the oat seedling. Publication of the final revised values of all solar constant results from all observing stations from 1923 to the present time is expected during the coming year. Archaeological excavations in south-east Mexico have been continued in co-operation with the National Geographic Society. Excavations at the Lindenmeier site in northern Colorado have afforded much additional evidence of the presence of Folsom man.
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The Smithsonian Institution: Annual Report. Nature 147, 539–540 (1941). https://doi.org/10.1038/147539d0
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DOI: https://doi.org/10.1038/147539d0