Use of an appropriately adapted garden spray to inject fixative fluid, the composition of which is given in the study, permits of eliminating difficulties encountered in fixing the carcasses of large mammals. Fixed whole carcasses can be used for macroscopic investigations for a long period. The position, shape and colour of internal organs changes very little, which facilitates preparation and permits of obtaining good photographs. Histological preparations made from sections taken several months after the animal's death stain in a typical way and make it possible to trace the structure or organs. The fixation of material intended for anatomical research is a very old problem.