(ASTRONOMY) henry paul prosper La Photographie Astronomique

Sale 1954 - Lot 19

Price Realized: $ 2,530

?Final Price Realized includes Buyer’s Premium added to Hammer Price

Estimate: $ 2,500 - $ 3,500

(ASTRONOMY.) henry, paul & prosper. La Photographie Astronomique à l'Observatoire de Paris et La Carte Du Ciel. By Ernest Mouchez. Illustrated with 4 albumen and 2 heliogravure plates after photographs by the Henry brothers, and with the original printed glassine overlay keys. 16mo, cloth with a leather title label on the spine; contents lightly foxed and age darkened, binding professionally reinforced. Paris, 1887

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The prototype for pioneering astronomer Ernest Mouchez's "Carte du Ciel" or map of the skies. Mouchez, the director of the Paris Observatory, set out to collaborate with 18 other observatories to chart the heavens. For this volume, he used Proper and Paul Henry's astrograph. The astrograph had a special lens which compensated for the earth's rotation in order to prevent blurring during the long exposures needed to capture these luminous images.