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Appearance of blood stains-Methods of removing blood stains-Microscopical examination-Spectroscopical examination-Other coloured stains.

To say whether suspected spots are blood is frequently a matter that requires great care and experience in spectroscopic and microscopic examinations. The identification of blood stains not unfrequently furnishes an important link in the chain of evidence in a trial for homicide. It is a common practice when the garments of a suspected murderer are found with red stains on them to attribute the stains to the blood of some domestic animal or bird, or to spots of paint, dye, fruit stains, &c.

Appearance of blood stains. Blood stains vary very much. in size, shape, and colour. If the blood has spurted to a distance from a small artery upon the surface of some nonabsorbent object, the spots present a comet-like shape, terminating in a bulbous tail. The upper portion of the spot is

VOL. II.

B

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