By: DUNER, Nils Christofer (1839-1914).
Uppsala:, Edv. Berling, 1891.: 1891
Seller ID: S6288
4to. [ii], 78 pp. Tables, 1 lithographic plate. Original printed wrappers (removed from a larger collection of papers, roughing the spine). PRESENTATION COPY: "A l'Academie des Sciences de Philadelphia; hommage de l'observatoire d'Upsala." Ex library rubber stamp. Very good. FIRST EDITION. Nils Duner became professor of astronomy at Uppsala University and director of the observatory in 1888. His measurements of solar rotation obtained evidence for the decrease in the velocity of rotation from the equator to the latitudes Â±75 degrees. DSB, IV, pp. 250-251. First Edition. View More...