By shading off, as I have done, the portion of the area of the diagram according to the individual age, every one may see how much of life is consumed, and what is left. — Warren De la Rue Copy Share Image
Nature's laws must be obeyed, and the period of decline begins, and goes on with accelerated rapidity. — Warren De la Rue Copy Share Image
By shading off, as I have done, the portion of the area of the diagram according to the individual age, every one may see… — Warren De la Rue Copy Share Image
