Margaret Reily, 1854.

Unknown

 
Margaret Reily, 1854.
4 0 c m
 
34cm
actual image size: 26cm x 32cm

Description

A hand-coloured daguerreotype of Margaret Reily, taken by an unknown photographer in 1854. In 1839, the Daguerreotype, invented by Louis Jacques Mande Daguerre [1787-1851], became the first photographic process to be announced to the public. A highly-polished silver surface on a copper plate was sensitised to light by exposing it to iodine fumes. After exposing the plate in a camera it was developed with mercury vapour. Daguerreotypes are unique images which may appear as a positive or negative depending on how light hits the surface.

© National Museum of Science & Media / Science & Society Picture Library

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