EXPOSITION
LEPROSY IN CLOTHES (Leviticus 13:47-59). To account for the use of the name leprosy in this connection, an ingenious theory has been propounded that the same cause produced a like effect in the human frame in clothes and in houses. "There is here described a disease whose cause must have been of organic growth, capable of living in the human being and of creating there a foul and painful disease of contagious character, while it could also live and reproduce itself in garments of wool, linen, or skin; nay, more, it could attach itself to the walls of a house and there also effect its own reproduction. Animalcules, always capable of choice, would scarcely be found so transferable, and we are therefore justified in supposing that green or red fungi, so often seen in epidemic periods, were the protean disease of man and his garment and his house" (Dr. Mitchell, 'Five Essays'). It is not necessary to have recourse to this tempting but unproved hypothesis, inasmuch as the similarity of appearance presented by the two affections is enough to account for their going by the same name. Leprosy in garments and in leather is a mildew which cannot be got rid of, called leprosy by analogy. Like other causes of uncleanness, it makes the material unclean, because it gives a repulsive appearance to it, reminding the beholder of the disease which it resembles. "Leprosy in linen and woolen fabrics or clothes consisted in all probability in nothing but so-called mildew, which commonly arises from damp and want of air, and consists, in the case of linen, of round, partially coloured spots, which spread and gradually eat up the fabric, until it falls to pieces like mould. In leather, the mildew consists more strictly of' holes eaten in,' and is of a greenish, reddish, or whitish colour, according to the species of the delicate cryptu-gami by which it has been formed ' (Keil).