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Graunt's Observations.

are fourteen Men for thirteen Women, as elsewhere hath been said[1].

8. We have (though perhaps too much at Random) determined the number of the Inhabitants of London[2] to be about 384000: the which being granted, we assert, that 199112 are Males, and 184186 Females.

9. Whereas we have found[3], that of 100 quick Conceptions about 36 of them die before they be six years old, and that perhaps but one surviveth 76[4]; we having seven De-|84|cads between six and 76, we sought six mean proportional numbers[5] between 64, the remainder, living at six years, and the one, which survives 76, and find, that the numbers following are practically near enough to the truth; for men do not die in exact proportions, nor in Fractions, from whence arises this Table following.

Viz. Of an hundred there die within the first six years[6] 36
  1. See p. 374.
  2. Excluding Westminster and the six parishes enumerated at p. 345.
  3. See p. 349.
  4. From the bills Graunt calculates (p. 352) that seven in 100 survive 70. The grounds of his assumption that but one survives 76 are not evident.
  5. This method of constructing a table of mortality suggests Petty's Discourse of Duplicate Proportion.
  6. With this calculation of London's mortality may be compared the figures for Geneva in the seventeenth century. The following table, compiled from Edouard Mallet's Recherches hist. et stat. sur la population de Genève (Annales d'hygiène publique et de médecine légale, xvii. p. 30, Janv., 1837), gives the returns for all the persons whose age at death was recorded in the years 1601—1700. The table reveals a juvenile mortality even higher than Graunt's calculation for London.
    Age in years. Number of deaths. Percentage.
    1—6 22,967 42·6
    7—16 4,949 9·3
    17—26 4,052 7·6
    27—36 3,761 7·1
    37—46 3,938 7·4
    47—56 4,026 7·6
    57—66 3,800 7·2
    67—76 3,273 6·4
    77—86 2,436 4·7
    87—120 581 0·1
    ——— ———
    53,783 100