Harden in Müller’s fluid. Stain in picrocarmine or eosine and hæmatoxyline. Also stain sections in safranine, which stains the colloid material, and also picks out any colloid formation in the cells themselves. *Thymus.*--Remove from a fœtus or a very young animal, and prepare in the usual way. *Tongue.*--That of the cat or rabbit serves very well. Ordinary transverse sections should be made, and also sections through the circumvallate papillæ in order to study the “taste buds.” *Salivary glands.*--Those of a cat or dog do very well. Sections should be made from each of the three glands. *Stomach.*--That of the cat or dog should be studied. The organ must be removed immediately after death before any post-mortem digestion of the coats has occurred. The stomach should be opened, washed gently and pinned out flat, with as little stretching as possible on a piece of wood, and hardened in Müller’s fluid. Sections should be made (_a_) longitudinally through the cardiac end to show the transition from the œsophageal to the gastric mucous membrane, (_b_) from a portion of the greater curvature, (_c_) longitudinally through the pyloric valve. Eosine and hæmatoxyline form the best stain for the alimentary canal. *Intestine.*--Prepare in the same way as the stomach. Make sections from (_a_) the upper part of the duodenum to show Brunner’s glands, (_b_) the ileum, (_c_) a Peyer’s patch, (_d_) the vermiform appendix, (_e_) the colon. *Liver.*--Make an injection of one specimen with carmine and gelatin (p. 120). Harden in methylated spirit. Others should be hardened in Müller’s fluid and stained in the usual way. *Kidney, supra-renal, and pancreas.*--Same preparation as for liver. *Spleen.*--Harden in Müller’s fluid. Mount one section unstained. Shake another up with water in a test tube to shew the structure of the pulp. Stain others in eosine and hæmatoxyline. *Bladder.*--Must be removed and pinned out immediately after death, as otherwise the epithelium will be macerated off. Consequently it must be taken from an animal, as a cat. Harden in osmic acid. Cut in celloidin as the coats are very apt to become detached. *Penis* and *testis*.--Readily obtained from dog, cat, or rat. Stain with eosine and hæmatoxyline. *Uterus, ovaries, and Fallopian tubes.*--May be obtained from the post-mortem room or from the lower animals. Harden in Müller’s fluid, and make sections from the cervix, the body of the uterus, the Fallopian tube, and the ovary. Stain with eosine and hæmatoxyline. *Embryological specimens.*--For systematic work special manuals should be consulted. Specimens should be hardened in osmic acid or in Müller’s fluid, and cut in celloidin, or paraffin. *Cloudy swelling.*--Specimens are obtained from organs of subjects who have died in the early stage of some fever. They should be always hardened in Müller’s fluid, as the appearances alter if the tissue is kept in spirit for any length of time.