This will be a record of the progress of medical photography and its various branches. Each number will contain six handsome collotypes, printed on the finest art paper and representing clinical cases in which diagnosis has been effected with the aid of Röntgen's X Rays. (The size of each plate is 10 by 12inches.) Each plate is accompanied by explanatory text, printed on.the best supercalendered paper (10 by 12 inches). The first number contains an introduction giving a full illustrated description of the methods relating to skiagraphy.