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A. E. (Andrew Ellicott) Douglass (July 5, 1867 in Windsor, Vermont – March 20, 1962 in Tucson, Arizona) 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.
Andrew Ellicott (January 24, 1754 – August 28, 1820) was an American land surveyor who helped map many of the territories west of the Appalachians, surveyed the boundaries of the District of Columbia, continued and completed Pierre (Peter) Charles L'Enfant's work on the plan for Washington, D.C., and served as a teacher in survey methods for Meriwether Lewis.
On January 1, 1793, Andrew Ellicott submitted to the commissioners a report that stated that the boundary survey had been completed and that all of the boundary marker stones had been set in place. Ellicott's report described the marker stones and contained a map that showed the boundaries and topographical features of the Territory of Columbia.
In 1763 Mason and Dixon began a survey of the Pennsylvania–Maryland border, but this work was interrupted in 1767. In 1784 Rittenhouse and Andrew Ellicott completed this survey of the Mason–Dixon line to the southwest corner of Pennsylvania. When Rittenhouse's work as a surveyor ended, he resumed his scientific interests.
George Ellicott (1760–1832) was a son of Andrew Ellicott, who with his two brothers (all were Quakers from Bucks County, Pa.) founded Ellicott's Mills (now Ellicott City), Maryland. [1] He was a mathematician, an amateur astronomer, a younger cousin of surveyor Major Andrew Ellicott and a friend of Benjamin Banneker .
In a 1969 publication, Bedini reported that Martha Ellicott Tyson, a Quaker abolitionist who was a daughter of George Ellicott (Andrew Ellicott's cousin) [11] and a co-founder of Swarthmore College, [12] had prepared an account about Banneker's alleged involvement with the survey and planning of the federal city within her papers, which her own ...
John, Andrew, and Joseph Ellicott founded Ellicott's Mills which became one of the largest milling and manufacturing towns in the East. [3] The Ellicott brothers helped revolutionize farming in the area by persuading farmers to plant wheat instead of tobacco and also by introducing fertilizer to revitalize depleted soil. [4]
Garrett Putnam Serviss (March 24, 1851 – May 25, 1929) was an American astronomer, popularizer of astronomy, and early science fiction writer. Serviss was born in Sharon Springs, New York [1] and majored in science at Cornell University.