The author advises the addition of a small quantity of Armenian bole to the plaster used for the cast, as it gives a less ghastly tint and aids much by its color in the cutting away of the white mold from the cast. Several of these casts, taken before and after operation by the author, have been shown in the preceding chapters. After operation and healing of the parts a second cast is made. Hooks can be inserted into the casts, when still soft, to hang them up by, or loops of string or wire are stuck into them, while setting for the same purpose. Such a collection is not only of great value to the operator, but is a means of constant and absolute record, even to the extent of reproduction by photography. The necessary data in respect to the method employed in operating, dressing, etc., is to be added to the record as generally done with medical or other surgical causes. =Preparation of Photographs.=—There are some cases of which no other permanent record can be made, except by photograph. If these can be obtained, the negatives are to be printed without retouching, the prints being made on silver printing paper of the glossy type to permit of reproduction in half-tone when desired at some future time. In printing such pictures, the eyes, or other part of the face not operated on, may be obliterated by laying strips of paper next to the negative, the part thus covered coming out white in the positive. The photographs made of parts to be operated on should be made as near as the normal size, for obvious reasons of accuracy and measurement. This can be done by comparing the size of the part to the picture found on the ground glass. Cameras that do not permit of ground-glass focusing are useless as well as uncertain. Time exposures are necessary for the best results. Dark backgrounds should be used to get the sharp outlines by contrast. Too much light on the parts, such as direct sunshine, is undesirable, as it makes the parts appear flat and lifeless; therefore a muslin screen is of great value to graduate the intensity of the light, and if this is not at hand, a sheet of paper will answer the same purpose. In printing make note of the depth of color of the parts most desired to be shown, varying with the different parts of the face. Look to contrast, and in pathological cases have the diseased area printed so that it will stand out forcibly as compared to the fellow organ in health or the normal tissue beyond its border. To protect photographic records, they should be properly bound in book fashion to avoid scratching, rubbing, or breaking. This not only implies neatness and thoroughness on the part of the surgeon, but also permits of ready reference at all times. An index to the contents of such a book is a desirable adjunct. INDEX TO AUTHORS ADAMKIERWICZ, osteoplasty, 101. D’ALGUIE, rhinoplasty, 360. ALLIOT, history of reparative surgery, 5. ALLIS, inhaler, 65. VON ALTMANN, bioblasts, 100.