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Elizabeth Langdon Williams
Elizabeth Williams, who worked as a computer for Lowell Observatory beginning in 1905.
Letter from Elizabeth Williams to Percival Lowell discussing Planet X calculations
Letter from Elizabeth Williams to Percival Lowell discussing mathematical calculations of Planet X and Uranus. Williams worked in Lowell's Boston office for many years as a computer, making calculations associated with Lowell's search for Planet X.
Trans-Neptunian planet (Planet X) computations by Elizabeth Williams
Trans-Neptunian planet (Planet X) computations by Elizabeth Williams, who worked in Percival Lowell's Boston office as a computer, i.e. a person who manually made calculations.
Wrexie Leonard's Scrapbook Number 1
This scrapbook contains newspaper clippings, cartoons, illustrations, and a few photographs.
Wrexie Leonard's Scrapbook Number 2
This scrapbook contains birth, death, and marriage announcements.
Wrexie Leonard's Scrapbook Number 3
This scrapbook contains handwritten accounts and mementos from Leonard's personal life.
Lowell Observatory Logbook Page, January 3-9, 1900
Logbook page with drawings of Venus by Wrexie Leonard and Percival Lowell
Lowell Observatory Logbook Page, Feb. 22, 1897
Drawings of Mars by Wrexie Leonard, Percival Lowell, and T.J.J. See
Lowell Observatory Logbook Page, March 4, 1897
Drawings of Mars by Wrexie Leonard and Percival Lowell
Lowell Observatory Logbook Page, March 19, 1897
Drawings of Mars by Wrexie Leonard and Percival Lowell