Mr Waddington lances the pustules with a needle, and thus allows the poisonous matter (which is the cause of the disfigurement) to escape, and also orders the room to be kept dark. Mr. Wad-dington states that, during twelve years' practice, he has not known one case out of twenty of a person being marked by the small-pox, when the above simple expedient has been resorted to. (See 1018.)