The necessity of making special preparations for an autopsy depends upon its performance in a regularly appointed autopsy room or under the conditions of private practice. In the former case the autopsy room should be constructed to meet the demands of the work. In teaching hospitals it should be a large, well-lighted and properly-ventilated room with proper facilities for teaching-staff and students, and should be so connected with the hospital wards that the conveyal of bodies may be protected from observation. In the same building there should be the pathological laboratory, library and museum, a waiting-room, and under some conditions a chapel for funeral services. The autopsy room itself should have a grooved concrete floor sloping to a central drain, the furniture should be of simple construction, and so built that the entire room may be washed with a hose. The seats should be arranged in an amphitheatre facing the northern side of the building, which should be constructed practically wholly of glass, the lower sashes containing ground glass or prisms. The northern half of the roof should likewise be of glass. [Illustration: FIG. 23—Hand Bone-Drill] In the pit, in the field of strongest illumination, should be placed the autopsy table. This should be strongly built, of marble, slate, soapstone, artificial stone, copper, zinc, etc., about seven feet long, thirty inches wide, and thirty to thirty-six inches high. A high table is much preferable to a low one. It should have a top with grooves slanting toward a central perforated plate fixed in the central hollow standard in such a way that the top may be freely revolved. In the standard there should be a drain and ventilating shaft connected with a fan revolving outward. The drain from the table as well as the others from the laboratory should empty into a large catch-basin where the contents may be sterilized before passing into the main sewer. Above the table a combination gas and electric light with hot and cold water-pipes should be arranged. A sheet of blue glass of the proper tint may be used in connection with the illuminating apparatus to give daylight effects. Extra tables, weighing and measuring apparatus, sinks, lavatories, bacteriologic outfit, sterilizer, instrument-case, etc., may be supplied as needed. In the case of delayed permission, or when the law requires that the bodies be kept a certain length of time before the autopsy, it becomes necessary to provide a proper cold-storage apparatus. The local conditions will suggest the most convenient and appropriate construction. In routine autopsy service well-trained assistants and attendants become a necessary factor in the satisfactory performance of the work.