
Johann Heinrich Schulze
Johann Schulze was a German physician and anatomy professor who made a significant discovery in the development of photography when he observed that silver salts darkened when exposed to sunlight. In 1725, while attempting to create a phosphorescent material by combining a slurry of chalk with...

Thomas Sutton
Thomas Sutton, who was born in Kensington, London, studied architecture before earring a Bachelor of Arts degree from Caius College in Cambridge. Photography first entered his life in 1841 when he posed for a daguerreotype portrait in Antoine Claudet's studio. In 1855 he set up a photographic...