Мост через Чикахомины.

The albumen silver print is a photographic printing process that was widely used in the 19th century. It involves coating paper support with a mixture of egg whites and salt, which creates a glossy surface to hold light-sensitive silver salts. The paper is then sensitized in a solution of silver nitrate, and exposed in a camera or under a negative. After exposure, the print is developed in a solution of gallic acid and silver nitrate, which reduces the silver salts to metallic silver and creates the final image. The albumen print process was widely used for commercial and fine art photography in the 19th century and produced high-quality, detailed images with a distinctive glossy finish.

Соединенные Штаты история гражданская война 1861 1865 мосты тележки вагоны отдел рукописей и архивов записи санитарной комиссии США высокое разрешение создатель санитарной комиссии США Гарднер Александр 1821 1882 фотограф тележки и вагоны архивные материалы белковые отпечатки мост чикагомини сжатый исторический материал переписка 19 век nypl

1861 - 1871

New York Public Library

http://digitalcollections.nypl.org/

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