T. Frederick Hardwich

Born in 1829, Thomas Frederick Hardwich was an English photographic chemist, teacher, and writer whose work mattered at a key moment in the development of photography. He worked at King's College London as curator of the laboratory, demonstrator of chemistry, and later lecturer in photography, and he was active in the early Photographic Society.

He is best known as the author of A Manual of Photographic Chemistry, first published in 1855 and expanded through later editions. The book helped photographers understand the chemistry behind processes such as collodion work, making technical knowledge more accessible during the medium's early years.

Hardwich's life later changed direction in a striking way. After his years in photography, he left London, entered holy orders, and served as a curate in Shildon, County Durham; sources also describe him as later working as a doctor there. He died in 1890, remembered today for linking scientific explanation with the practical craft of Victorian photography.