A Becquerel daguerreotype from 1840

Daguerreotype Becquerel

A Becquerel daguerreotype from 1840“Daguerrian image developped without mercury by the continuator action of red rays observed by Edmond Becquerel”, 184068 mm circular daguerreotype belonging to the Museum Nicéphore Niépce collection, Chalon-sur-Saône.