Medical Jurisprudence, Vol. 2
Forensic Medicine and Toxicology (Classic Reprint)
Description:... Excerpt from Medical Jurisprudence, Vol. 2: Forensic Medicine and Toxicology First, is the stain a blood stain, or does it contain blood? Second, if a blood stain, does the blood come from a bird, fish, reptile, or from a mammal? Third, if the blood is mammalian blood, did it come from any given species Of mammal? This question usually assumes the form Of whether the stain is a human blood stain or that of some animal. In some cases the data given are such that the question only arises as between human blood and that of some specified animal. It is some times alleged, for instance, that the blood is that of a chicken, fish, pig, horse, ox, or sheep, in which case the expert is only called upon to decide between a stain made by human blood and that of the animal mentioned. In other cases, however, no data are given, and the expert must state whether his examina tion has given results which show that the blood in the stain examined is, or is not, consistent with its having originated from a human being.
The methods employed for the identification Of blood stains are: First, chemical; second, optical; third, microscopi cal examination for the identification of the blood corpuscles, or a combination Of all Of these methods Of investigation. But before considering these in detail it is necessary to take up some Of the physical and other properties of the blood, which may have a very important bearing in certain medico-legal cases.
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