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 Quotes
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| Birth: | 18th January, 1815 |
| Death: | 19th April, 1889 |
| Nationality: | American |
| Profession: | Astronomer, Chemist |
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