The ileum is then severed from the mesentery as follows: The intestine is pulled by the left hand straight down in the middle line of the right thigh, putting the mesentery on a stretch. The long section-knife is used by the right hand to cut the mesentery close to the intestine in a manner resembling the use of the bow in violin-playing. The blade of the knife is held slightly obliquely against the mesenteric insertion of the intestine, and as the left hand pulls up the coils of intestine against the knife, the latter in the bowing or sawing movement severs the mesentery from the intestine as close to its insertion as is possible without cutting the intestine. The freed portions of intestine are caught in the tray resting on the thighs, and the left hand grasps in succession new portions of the small intestine and pulls them against the knife until the entire intestine is freed up to the duodenum and the root of the mesentery. A double ligature is put around the jejunum and the intestine severed between the ligatures, and the freed jejunum, ileum and large intestine are now removed in the tray for examination. The severing of the intestine from the mesentery in this manner can be carried out very quickly after a little practice. Care must be taken to cut the mesentery as close as possible to the intestine without nicking the latter. If too much mesentery is left on the intestine it cannot be laid out straight and its opening is made more difficult. If the coils of the small intestine are left in their natural position, and if the ileum when it is first taken up by the left hand is not twisted, the coils will unroll before the knife without any difficulty. Some prosectors begin with the jejunum, ligating it at the point where it comes out from beneath the mesentery, cutting it between the ligatures and separating it from the mesentery downward until the entire intestine as far as the rectum has been freed. The latter is ligatured and the freed portions removed. When the saving of time is of great importance the large intestine may be freed as described above, a ligature put around the upper end of the jejunum, and the mesentery severed at its root, so that the entire mass of small intestine with its mesentery is removed for further separation from the mesentery outside of the body. When peritoneal adhesions that cannot be easily torn are present it may be necessary to remove the intestines with mesentery attached.