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ABSTRACT
The presence of blood and its origin was studied on various types of cloth, immersed in water, for up to 20 days. Blood could be detected by the benzidine and phenolphthalein reactions until at least 20 days, whereas the haemochromogen test produced no crystals after any period of water immersion, with any type of cloth. The species origin could be demonstrated with woollen cloth after up to five days of water immersion whereas with other types of cloth, it could be detected until after from six hours to two days of water immersion.