From the beginning of the 20th century to the 1950s, Jacques Boyer (1869-1960), photographer – “scientific publicist” as he presented himself – established in Paris 5 bis rue Saint-Paul, imports, distributes and realized an important photographic production in scientific and technical fields (experiences and experiments, innovative manufacturing processes, apparatus and machines, factory and workshop installations, portraits of scientists in the broad sense, doctors, researchers). In addition, he abundantly photographed Paris, daily life and small trades for more than forty years. The Roger-Viollet Agency acquired the Jacques Boyer collection – more than 35,000 negatives and 6,000 vintage prints – in 1963.