By the action of certain dyes upon the corpuscles their special features are rendered easier of recognition. Any of the approved methods of preparing blood films for general clinical purposes, which will suit the circumstances, may be employed. An easy and reliable method is as follows. A drop of the solution of the blood-stain properly prepared as previously recommended, or if obtainable a small coagulum moistened with normal saline solution, is placed on a clean coverslip and spread evenly over its surface with the aid of a fine glass rod. The film is allowed to dry in the air, covered with a watch-glass for protection against dust. When dry it is passed three times through the flame of a Bunsen burner, or placed in a mixture of equal parts of absolute alcohol and ether, to fix it. After fixation it should be placed for a minute or more in an aqueous solution of eosin. Any excess of stain should be removed by washing in distilled water, and the specimen allowed to drain by standing it on edge upon a piece of filter paper; it should then be allowed to dry, and then counterstained with a freshly prepared aqueous solution of methylene blue, hæmatoxylin solution, or other nuclear dye. Wash again in distilled water, allow to dry, and mount in Canada balsam. By this method the corpuscle will be stained pink, and if nucleated, the nucleus will be stained by the methylene blue, hæmatoxylin, or other nuclear stain which may have been used. Leishman‘s stain may be used. This stain being a methyl-alcohol solution is used for fixing and staining at the same time. A few drops of the stain is placed on the dried film; after standing until evaporation is almost complete, distilled water is dropped on to the slide, and left to stand for two or three minutes, it is then drained off, and a few more drops of distilled water added until the film is pink in colour, then dried with filter paper. Red corpuscles are tinted red with the eosin, and nuclei of leucocytes or nucleated red cells violet or deep blue. The specimen may be examined direct with the oil immersion or mounted in Canada balsam. When examining specimens prepared from blood-stains, it is necessary to search carefully for other cellular structures such as epithelial cells, spermatozoa, or fragments of hair. It may be advisable, in certain cases where the amount of material submitted for examination is small, to centrifugalise some of the solution in a fine glass tube, in order to determine any cellular elements present to one spot. By making use of this concentrated portion containing the cellular elements for the preparation of a microscopic specimen, one not only facilitates the microscopical examination, but is able to place more reliance upon the results obtained. The Results of Microscopical Examination of Blood-Stains in their Medico-Legal Relations.