Photographer. A physician, he pioneered indoor and portrait photography in the 1840s.
While on the staff of the University of Pennsylvania, he discovered that the exposure of a daguerreotype's iodine-sensitized silver plate to vapor of bromine permitted realistic portraits to be taken with exposure times of under a minute. He then worked with fellow physician Robert Cornelius to put his discovery into effect.
During the Civil War he was commissioned Major and Surgeon, US Volunteers on October 4, 1862, and directed one of the US Army Medical Hospitals in Philadelphia. He was honorably mustered out on April 8, 1865.
While on the staff of the University of Pennsylvania, he discovered that the exposure of a daguerreotype's iodine-sensitized silver plate to vapor of bromine permitted realistic portraits to be taken with exposure times of under a minute. He then worked with fellow physician Robert Cornelius to put his discovery into effect.
During the Civil War he was commissioned Major and Surgeon, US Volunteers on October 4, 1862, and directed one of the US Army Medical Hospitals in Philadelphia. He was honorably mustered out on April 8, 1865.
Photographer. A physician, he pioneered indoor and portrait photography in the 1840s.
While on the staff of the University of Pennsylvania, he discovered that the exposure of a daguerreotype's iodine-sensitized silver plate to vapor of bromine permitted realistic portraits to be taken with exposure times of under a minute. He then worked with fellow physician Robert Cornelius to put his discovery into effect.
During the Civil War he was commissioned Major and Surgeon, US Volunteers on October 4, 1862, and directed one of the US Army Medical Hospitals in Philadelphia. He was honorably mustered out on April 8, 1865.
While on the staff of the University of Pennsylvania, he discovered that the exposure of a daguerreotype's iodine-sensitized silver plate to vapor of bromine permitted realistic portraits to be taken with exposure times of under a minute. He then worked with fellow physician Robert Cornelius to put his discovery into effect.
During the Civil War he was commissioned Major and Surgeon, US Volunteers on October 4, 1862, and directed one of the US Army Medical Hospitals in Philadelphia. He was honorably mustered out on April 8, 1865.
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