This book not only talk about the formules, a description of the different apparatus and manipulations which are necessary for the mechanicalproduction of a photographic picture; the author has tried also to elucidate those art principles which we must follow when we wish to make an artistically beautiful picture.To speak of these principles is for a Photographic Handbook a necessity, particularly as at present portraiture is the most important branch of photography, and is likely to remain so.Book illustrated with a lot of images.