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Dr. Daniel Trembly MacDougal (March 16, 1865 – February 22, 1958) was an American botanist and writer. He is known for his work on desert ecology and as the earliest botanist to research Chlorophyll. He was the inventor of the MacDougal dendrograph, used to record changes in the volumes of tree trunks. He was a pioneer in studying the idea of Mutation Theory for controlling evolution. He helped to establish two botanical laboratories, the Desert Laboratory in Tucson, Arizona, and the Coastal Laboratory in Carmel-by-the-Sea, California. (From Wikipedia) More about Daniel Trembly MacDougal:
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| | Books by Daniel Trembly MacDougal: ![[Info]](https://onlinebooks.library.upenn.edu/info.gif) MacDougal, Daniel Trembly, 1865-1958: The Pneumatic System of Plants, Especially Trees (Carnegie Institution of Washington publication #441; 1933), also by Earl B. Working (page images at HathiTrust)- MacDougal, Daniel Trembly, 1865-1958, ed.: Species and Varieties: Their Origin by Mutation (second edition; Chicago: The Open Court Publishing Company, 1906), by Hugo de Vries (Gutenberg text and illustrated HTML)
- MacDougal, Daniel Trembly, 1865-1958: Studies in Tree-Growth by the Dendrographic Method (Carnegie Institution of Washington publication #462; 1936) (page images at HathiTrust)
Additional books by Daniel Trembly MacDougal in the extended shelves:![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif) MacDougal, Daniel Trembly, 1865-1958: [Papers on evolution. (Gent, etc., 1879), also by Hugo de Vries, A. A. W. Hubrecht, and Henri Hus (page images at HathiTrust)- MacDougal, Daniel Trembly, 1865-1958: Across Papagueria. ([New York?, 1909) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Botanic gardens ([D. Appleton and company], 1897) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Botanical features of North American deserts (Carnegie Institution of Washington, 1908) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Camp-fires on desert and lava (Scribner, 1909), also by William T. Hornaday, Godfrey Sykes, John M. Phillips, and Charles Scribner's Sons (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: The condition of parasitism in plants. (Carnegie institution of Washington, 1910), also by William Austin Cannon (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: The course of the vegetative seasons in Southern Arizona (Plant World Association, 1908) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: A decade of the Salton Sea. (American Geographical Soc., 1917) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: The desert basins of the Colorado Delta (New York, 1907) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Desert botanical laboratory of the Carnegie institution (The Carnegie institution, 1903), also by Frederick V. Coville (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Elementary plant physiology (Longmans, Green, and Co., 1902) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: End results of desiccation and respiration in succulent plants (Physiological Researches, 1915), also by J. G. Brown and Esmond R. Long (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Experimental plant physiology. (H. Holt and company, 1895) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Experimental plant physiology (Henry Holt and Co., 1898) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Experimental plant physiology (Morris & Wilson, 1894), also by Walter Oels (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Experimental plant physiology (Morris & Wilson, 1894), also by Walter Oels (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Fifty years of Darwinism; modern aspects of evolution; centennial addresses in honor of Charles Darwin, before the American Association for the Advancement of Science, Baltimore, Friday, January 1, 1909. (H. Holt and Company, 1909), also by American Association for the Advancement of Science, G. Stanley Hall, Henry Fairfield Osborn, Carl H. Elgenmann, Charles Benedict Davenport, William E. Castle, Edmund B. Wilson, David Starr Jordan, John Merle Coulter, and Edward Bagnall Poulton (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: The green leaf; the major activities of plants in sunlight. (D. Appleton and company, 1930) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Growth in trees (Carnegie Institution of Washington, 1921) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Growth in trees. ([Philadelphia, 1921) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Growth in trees and massive organs of plants : dendrographic measurements ; The growth record in trees, by Forrest Shreve. (The Carnegie Institution of Washington, 1924), also by Forrest Shreve (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Heredity and environic forces : an address before the American Association for the Advancement of Science, Chicago meeting, 1907-1908. (Washington, 1907) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Heredity and the origin of species. (The Open court publishing company, 1905) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Hydration and growth (Carnegie institution of Washington, 1920) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: The hydrostatic-pneumatic system of certain trees; movements of liquids and gases (Carnegie Institution of Washington, 1929), also by Gilbert Morgan Smith and James B. Overton (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: The hydrostatic system of trees (Carnegie institution of Washington, 1926) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Living plants and their properties; a collection of essays (Baker and Taylor, 1898), also by Joseph Charles Arthur (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Mutants and hybrids of the oenotheras. (Carnegie Institution, 1905), also by John Kunkel Small, George Harrison Shull, and Anna Murray Vail (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Mutations, variations, and relationships of the oenotheras (Carnegie Institution of Washington, 1907), also by George Harrison Shull and Anna Murray Vail (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: The nature and work of plants; an introduction to the study of botany (Macmillan, 1900) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Practical text-book of plant physiology. (Longmans, Green, and co., 1901) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Practical text-book of plant physiology (Longmans, Green, and Co., 1912) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Reversible variations in volume, pressure, and movements of sap in trees (Carnegie Institution of Washington, 1925) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: The Salton Sea; a study of the geography, the geology, the floristics, and the ecology of a desert basin (Carnegie institution of Washington, 1914) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: The Salton Sea; a study of the geography, the geology, the floristics, and the ecology of a desert basin (University Microfilms, 1967) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Species and varieties; their origin by mutation. (Open Court Pub. Co.;, 1906), also by Hugo de Vries (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Species and varieties, their origin by mutation (The Open court publishing company; [etc., etc.], 1912), also by Hugo de Vries (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Species and varieties, their origin by mutation; lectures delivered at the University of California (The Open court publishing company;, 1905), also by Hugo de Vries (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: Species and varieties; their origin by mutation. Lectures delivered at the University of California. Edited by Daniel Trembly MacDougal. (Open Court, 1906), also by Hugo de Vries (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: The water-balance of desert plants. ([London, 1912) (page images at HathiTrust)
- MacDougal, Daniel Trembly, 1865-1958: The water-balance of succulent plants (Carnegie Institution of Washington, 1910), also by E. S. Spalding (page images at HathiTrust)
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