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According to Wikipedia , A. E. Douglass was an American astronomer. He discovered a correlation between tree rings and the sunspot cycle, and founded the discipline of dendrochronology, which is a method of dating wood by analyzing the growth ring pattern. He started his discoveries in this field in 1894 when he was working at the Lowell Observatory. During this time he was an assistant to Percival Lowell, but fell out with him when his experiments made him doubt the existence of artificial "canals" on Mars and visible spokes on Venus.
(See a Problem?) A. E. Douglass's Published Works
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1900 1910 1920 1930 1940 0 25 50 75 100 125 150 175 200 225 250 275 300 325 Published Works Crossdating in Dendrochronology (1941) Climatic cycles and tree-growth Evidence of Climatic Effects in the Annual Rings of Trees A Method of Estimating Rainfall by the Growth of Trees The Climatic Factor As Illustrated In Arid America Dating Pueblo Bonito and other ruins of the Southwest (1935) (75)Weather Cycles in the Growth of Big Trees (1909) Notes on the Technique of Tree-Ring Analysis, I (1941) (16)A study of the annual rings of trees in relation to climate and solar activity (16)SOLAR RECORDS IN TREE GROWTH. (1927) A study of cycles (1936) Accuracy in Dating - I. (1934) (8)A Cloud-Like Spot on the Terminator of Mars Typical Site of Trees Producing the Best Crossdating (1939) (7)Notes on Beam Dating by Sap-Heart Contact (1939) (7)The Central Pueblo Chronology (1936) (6)THE ORGANIZATION OF SCIENTIFIC MEN. (1924) Some Aspects of the Use of the Annual Rings of Trees in Climatic Study A Photographic Periodogram of the Sun-Spot Numbers (1914) An Optical Periodograph (1915) Survey of Sequoia Studies (1945) (5)Photographic Tree-Ring Chronologies and the Flagstaff Sequence (1947) (5)II. Evidences of Cycles in Tree Ring Records. (1933) Estimated Ring Chronology, 150-1934 A. D. (1940) (4)Examples of Spiral Compression Wood (1940) (4)Atmosphere, Telescope and Observer (1897) (3)THE LICK REVIEW OF 'MARS.'. (1896) THE AURORA OF MAY 14, 1921. (1921) A table of the geographical distribution of American Indian relics in a collection exhibited in the American Museum of Natural History, New York : with explanatory text. Bulletin of the AMNH ; v. 8, article 10. The Callendar Sunshine Recorder and Some of the World-Wide Problems to Which This Instrument Can Be Applied (1916) (2)Tree Rings and Climate (1925) INDICATIONS OF A RAINY PERIOD IN SOUTHERN PERU. (1892) Is Mars Inhabited (1907) (2)Compression Wood and the Recent Chronology in Mesa Verda Firs (1940) (2)Drawings of Jupiter's Third Satellite (1897) The Lowell Observatory and Its Work (1895) (2)The Markings on Venus (1898) Southwestern Dated Ruins: V (1938) (2)Editorial: A Bibliography (1940) (2)The first satellite of Jupiter Sequoia Survey - III: Miscellaneous Notes (1946) (2)Observations of Mars, 1896 and 1897 (1900) (2)Accuracy in Dating - II. The Presentation of Evidence (1935) (1)A Superior Sequoia Ring Record (1949) (1)The Illusions of Vision and the Canals of Mars (1907) A Summary of Planetary Work at the Lowell Observatory and the Conditions Under Which It Has Been Performed (1)Tabulation of Dates for Bluff Ruin, Forestdale, Arizona (1944) (1)An Ascent of Popocatepetl (1897) (1)Some Topographic and Climatic Characters in the Annual Rings of the Yellow Pines and Sequoias of the Southwest (1)THE STEWARD OBSERVATORY OF THE UNIVERSITY OF ARIZONA (1918) TWILIGHT PHENOMENA IN ARIZONA, SEPTEMBER TO DECEMBER, 1916 (1916) Tree-Ring Work, 1937 (1937) (1)The annual rings of trees (1934) (1)Projections on the terminator of Mars and martian meteorology Estimated Tree Ring Chronology (1935) (1)Photograph of Shadow Bands (1926) EVIDENCE OF CLIMATIC EFFECT IN THE ANNUAL RINGS OF TREES. (1919) The correlation of sunspots. weather, and tree growth (1)Survey of Sequoia studies. II (1945) (1)Estimated Tree-Ring Chronology: 300-450 A. D. (1938) (0)Conservation of Renewable Natural Resources (1941) Advances in Dendrochronology, 1943 (1943) (0)Scales of Seeing (1898) (0)NOTE ON CERTAIN CLOUD FORMS OBSERVED AT TUCSON, ARIZ., AUGUST 18, 1924 (1924) The Astronomer's Globe (1897) (0)The Study of Atmospheric Current by the Aid of Large Telescopes and the Effect of Such Currents on the Quality of the Seeing (1895) (0)Ring Record from Chaco Canyon (1937) (0)Boating Down the Colorado (1907) (0)An Automatic Optical Photograph, Abstract (0)The Effects of Mountains On the Quality of the Atmosphere (0)GENERAL NOTES AND REVIEWS Present Rotation Period of the First Satellite of Jupiter and Its Change in Form and Period Since 1892 (1898) PHOTOGRAPHY OF ZODIACAL LIGHT AND COUNTERGLOW.2 (1916) A New Almucantar (1903) (0)A Superior Sequoia Ring Record. III, A. D. 360-886 (1950) (0)The Missing November Meteor (1900) (0)A Trip to the Summit of Orizaba, The Altitudes of Orizaba and Popocatepetl Effects of High-Mountain Climbing (0)Summary of Planetary Work at the Lowell Observatory (1899) (0)A Hypothesis Regarding the Surface Markings of Jupiter (1900) (0)A Superior Sequoia Ring Record. IV, 7 B.C.-A.D. 372 (1951) (0)Stellar Bands in the Zodiac from Gemini to Scorpio (0)Age of Forestdale Ruin, 1939 (1941) (0)Dendrochronology and Studies in “Cyclics” (1941) The 36-inch reflecting telescope of the Steward Observatory, Arizona (abstract) (0)University of Arizona Eclipse Expedition (0)Zodiacal Light and Counter-Glow and the Photography of Large Areas and Faint Contrasts (0)A Superior Sequoia Ring Record. V, 271 B.C.-1 B.C. (1951) (0)Drawings of a Comet (1910) (0)Estimated Ring Chronology VIII (750-900) (1936) (0)Notes on Atmospheric Conditions at Tucson, Arizona, 1909-1920 (1921) (0)Observations of the planet Mars during the oppositions of 1894, 1896, 1898, 1901 and 1903 : made at Flagstaff, Arizona (0)Estimated Ring Chronology IX: 600-750 (1936) (0)Note on the Early Durango Collections (1949) (0)PHOTOGRAPHS OF THE ZODIACAL LIGHT Canals in the dark regions and observations of the terminator (0)Estimated Ring Chronology III: 1500-1650 (1935) (0)THE UNIVERISTY OF ARIZONA ECLIPSE EXPEDITION. PORT LIBERTAD, SONORA MEXICO, SEPTEMBER 10, 1923 (1924) A Superior Sequoia Ring Record. II, A. D. 870-1209 (1950) (0)Checking the Date of Bluff Ruin, Forestdale; A Study in the Technique (1942) (0)Mars, January 1899 (1899) (0)Peculiar star spectra. (0)Photography of the zodiacal light and Gegenschein and other large faint objects (0)The White Spot on Mars, July 9 and 10, 1922 (0)Photographs of the Zodical Light (1901) (0)A Combination Telescope and Dome Tree Growth and Climate@@@Climatic Cycles and Tree-Growth: A Study of the Annual Rings of Trees in Relation to Climate and Solar Activity (1920) Atmospheric currents (abstract) (0)Weather Prediction in Northern Arizona (1900) (0)Estimated Tree-Ring Chronology: 450-600 A. D. (1938) (0)Coronal forms in the total eclipse of September 10, 1923 (abstract) (0)More Papers This paper list is powered by the following services:
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