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Estimate: $ 300 - $ 500
SECCHI, PIETRO ANGELO, S.J. Le Soleil. Exposé des Principales Découvertes Modernes sur la Structure de cet Astre,son Influence dans l'Univers, et ses Relations avec les autres Corps Célestes. 3 folding spectrographic plates, including 2 hand-colored; 129 text illustrations. xvi, 422 pages, including half-title. first edition * Le Soleil . . . Deuxième Édition, Revue et Augmentée. 13 plates, all but one in color. xx, 428; viii, 484 pages; 6 double-page spectrographic plates. [4] pages. 3 volumes, including atlas * Les Étoiles. Essai d'Astronomie Sidérale. 17 plates, including 9 in color. [2], xiv, 208; [4], 235, [1] pages, plus publisher's 48-page catalogue. 2 volumes. first edition in french. Together, 3 works in 6 volumes. Various sizes, first work in contemporary 1/2 morocco gilt with slightly faded spine, original wrappers bound in, second in contemporary 1/4 morocco gilt, third in original cloth with faded spines and Volume 1 joints partly cracked; varying foxing in all 3 works. Paris: Gauthier-Villars, 1870; Gauthier-Villars, 1875; Germer Baillière et Cie., 1879
'A pioneer in the study of the physical characteristics of celestial bodies, Pietro Angelo Secchi, S.J., observed spectra of the stars, classified more than 4,000 of them according to a scheme he devised, and made important studies of the physical constitution of the Sun. His achievements, during the 1860s and 1870s, contributed to the rapid growth of astrophysics as a new way of studying the heavens'—BEA, page 1039-40. DSB XII, 266-70.
