The body is turned on the right side, and, by means of a trephine, a round hole is cut into the back of the skull, about two inches above the cerebellum; the piece of bone thus taken out is preserved so as to be replaced into the opening after the operation is finished. Previous to cutting through the skull, a small incision in the shape of a cross, about two inches in length, each way, must be cut in the skin. The object of this is to leave the bone denuded after the skin has been detached from the bone, and also to bring the parts together by sewing, after the brain has been removed. Through the opening thus made in the skull, the brain, or the portion of it which can be reached, is easily removed by means of a small, slender spoon, with a long handle, made for the purpose. The cavity thus made in the head is to be filled with the following: Take two gallons or more of water, and saturate with alum, as much as it will dissolve; then mix with plaster of paris to the consistency of _very thin paste_, and fill the cavity of the brain; some cotton may then be introduced to keep the mixture inside; the round piece of bone cut from the skull is then replaced, the flaps of the cut in the skin brought together and neatly sewed up; if this operation is carefully performed, the cuts thus made cannot be perceived under the hair. Great caution should be exercised while removing the brain, in not wounding any of the veins and arteries which are inside that part of the skull, and with a little care this can be easily avoided. The body is then turned again on the back, in the former position, and all the cavities in the thorax and the abdomen, between and under the intestines, the liver, the lungs and the heart, must be well cleaned and dried with a sponge of all liquid or serum that might be found; pulverize some tannic acid into fine powder, and sprinkle heavily around and between the organs of the thorax and the abdomen; the sternum is then replaced over the thoracic opening, the flaps of the skin temporarily brought back over the abdomen, and the body, being enveloped in a sheet or some linen cloth, well saturated with the _lotion for the face_ as given in the first part of this chapter. The face, hands, feet, in fact every inch of the surface of the body, above and under, is to be covered with the cloth, tightly wrapped around it and well saturated as above directed. The body must be kept in this condition for about twelve hours, when the cloth is to be removed; the sternum is then raised again and the skin over the abdomen thrown back; a mixture of plaster of paris and alum, prepared as described above, is then poured over the whole of the thoracic and abdominal viscera, being careful to fill completely all the interstices existing between and under the different organs and the intestines.