Traité pratique de photographie sur papier négatif : par l'emploi de couches de gélatinobromure d'argent étendues sur papier
A practical French manual on gelatin-silver bromide negative paper photography by Eugène Trutat, published in Paris by Gauthier-Villars in 1883 for photographers and amateurs. Its engravings show cameras, tripods, plate holders and related apparatus drawn in crisp black line with hatched shading on plain cream paper. A designer could take from them a clean, technical diagram style, with lettered callouts, exploded views and simple folding-bellows camera forms.
