“Oh, I am aware of that,” said Madame de Villefort; “but I have a passion for the occult sciences, which speak to the imagination like poetry, and are reducible to figures, like an algebraic equation; but go on, I beg of you; what you say interests me to the greatest degree.”

“Well,” replied Monte Cristo “suppose, then, that this poison was brucine, and you were to take a milligramme the first day, two milligrammes the second day, and so on. Well, at the end of ten days you would have taken a centigramme, at the end of twenty days, increasing another milligramme, you would have taken three hundred centigrammes; that is to say, a dose which you would support without inconvenience, and which would be very dangerous for any other person who had not taken the same precautions as yourself. Well, then, at the end of a month, when drinking water from the same carafe, you would kill the person who drank with you, without your perceiving, otherwise than from slight inconvenience, that there was any poisonous substance mingled with this water.”

“Do you know any other counter-poisons?”