“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.”
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For a deeper interest in the Moon than I ever felt before.
Warren De la Rue 
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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
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Nature's laws must be obeyed, and the period of decline begins, and goes on with accelerated rapidity.
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