The story is told of a great lady, who had been the wife in succession to three husbands, all of whom had been devoted to her - for she was a woman of unusual intelligence, beauty, and character - that she was once asked how it was that men so different in disposition as her three distinguished husbands had been so greatly attached to her, and by what secret charm she had chained their minds and their hearts. The great lady replied simply, "I fed them well." But it is said that the lady outlived all but her third husband, and the question which this story suggests is: "Are the well-fed the long-lived?" This involves another question: "What is the proper amount of food to take at different periods of life?"