HISTORY OF PHOTOGRAPHY Magnesium lamp with continuous flame: a clockwork movement plays the metal wire that burns in the reflector; at the bottom a container to collect the ashes. Illustration from a photography manual written by Count Luigi Gioppi of Türkheim (1858 - 1930), doctor of law, knight of the Crown of Italy, co-founder and director of the magazine "Il Dilettante di Fotografia - Illustrated popular newspaper", authoritative compiler of manuals technical informative of photography and essays from other disciplines, as well as holder of public administrative positions. The work is dedicated to the Prince of Naples, future King Vittorio Emanuele III, illustrious "Dilettante di Fotografia". Ulrico Hoepli Edition, Publisher-Bookshop of Real Casa, Milan 1891