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A Treatise on Practical Astronomy: As Applied to Geodesy and Navigation
Gratis
Results of Observation with the Zenith Telescope of the Sayre Observatory from April 1, 1876, to December 27, 1893: Read April 4, 1902
Gratis
Results of Observations with the Zenith Telescope of the Sayre Observatory, from January 19, 1894, to August 19, 1895: Read Before the American Philosophical Society, October 19, 1900
Gratis
A Treatise on Practical Astronomy, as Applied to Geodesy and Navigation
Gratis
Results of Observations: With the Zenith Telescope of the Sayre Observatory, from April 1, 1876, to December 27, 1893
Gratis
Results of Observations with the Zenith Telescope of the Flower Astronomical Observatory: From October 1st, 1896 to August 16th, 1898
Gratis
Results of Observations with the Wharton Reflex Zenith Tube and the Zenith Telescope of the Flower Astronomical Observatory from January 9, 1904, to December 3, 1906: 1907-1915
Gratis
Results of Observations with the Zenith Telescope of the Flower Astronomical Observatory from September 6, 1898, to August 30, 1901: 1899-1905
Gratis