Rare Books
Monsieur Hevelius's Calculation of the late solar eclipse's quantity, duration, &c
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The illustrated account given by Hevelius in his "Machina celestis" of the method of mounting his telescopes and erecting an observatory
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The illustrated account given by Hevelius in his "Machina celestis" of the method of mounting his telescopes and erecting an observatory
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Calculations regarding solar eclipse by Thomas Cowper
Manuscripts
The Henry H. Sinclair papers number more than 1,600 items, including diaries, journals, newspaper clippings, and extensive personal and business correspondence. The complete date range is 1802-1937 (bulk dates 1909-1914). Subject matter includes mostly business matters of the Great Western Power Company, Palmer Oil Company, Mt. Hood Railway and Power Company, etc.; diaries and notebooks concerning power plant inspection trips, mostly to the Kern River in California; the Pasadena Tournament of Roses Association; the California to Honolulu yacht races. The collection also includes the papers of his son, Arthur W. Sinclair, pertaining to California Delta Farms, Inc. The collection also contains a diploma from Sinclair's membership in the American Institute of Electric Engineers and a manuscript, by Englishman Thomas Cowper, of calculations regarding a solar eclipse on June 24, 1778.
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