Search Results: le soleil 2 volumes atlas by secchi angelo 1818 1878

Paris:: Gauthier-Villars, 1875, 1877., 1875. 2 volumes + Atlas. Tall 8vo. xx, 428; viii, 484 pp. Atlas: [iv], 6 engraved double-page plates. 13 plates, 280 figs. (some in color). MEMORIAL BOOKLET BOUND IN: Padre Angelo Sechi (In More del Padre Angelo Secchi, Canto Dell'Avvocato B. Mattiauda. Roma: Tipografia Delle Scienze Matematiche e Fisiche, 1878.14 pp). Later half maroon gilt-stamped morocco, marbled boards, raised bands, top edge gilt, initials of owner on foot of spine. Signatures and armorial bookplates of Samuel Verplanck Hoffman. Very good. Second edition. "By observing sunspots at various solar latitudes, Secchi determined that the Sun had a differential rotation and behaves more like a liquid than a solid body. He named the bright areas around sunspots 'faculae', deduced (correctly) that solar granulation was attributed to the action of convection cells, and measured the effect of limb darkening. / Secchi's solar studies were summarized in Le Soleil, published in 1875-1877, in which… Read More