Carpenter's principles of human physiology (1881) (14779393544)

Identifier: carpentersprinci00carp (find matches)

Title: Carpenter's principles of human physiology

Year: 1881 (1880s)

Authors: Carpenter, William Benjamin, 1813-1885 Meneses, Henry Power

Subjects: Human physiology Physiology

Publisher: London : J. & A. Churchill

Contributing Library: Francis A. Countway Library of Medicine

Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

Text Appearing Before Image:

ch indicates itsdegree, at the respective periods marked along the base line. The dottedline, which follows a different curve, represents the viability of the Female.Starting from a, the period of birth, we arrive at the maximum of viabilityfor both at b : from this point, the Female curve steadily descends towards n,at first very rapidly, but afterwards more gradually ; whilst the male curvedoes not descend quite so soon, but afterwards falls much lower, its minimumbeing c, which corresponds with the age of 25 years. It afterwards ascendsto d, which is the maximum of viability subsequently to the age of puberty;this point is attained at the age of 30 years, from which period, up to 50, theprobability of life is greater in the Male than in the Female. In the declineof life, there seems little or no difference for the two sexes. 764. Similar diagrams have been constructed by Quetelet, to indicate therelative Heights and Weights of the two sexes at different ages (Fig 370).— Fig. 370.

Text Appearing After Image:

0 6 10 IS 20 26 SO £0 60 60 10 Diagram representing the Comparative Heights and Weights of the Male and Female at different Ages. In regard to Height it may be observed, that the increase is most rapid in thefirst jear, and that it afterwards diminishes gradually; between the ages of5 and 16 years, the annual increase is very regular. The difference betweenthe Height of the Male and Female, which has been already stated to presentitself at birth, continues to increase during infancy and youth; it is not verydecided, however, until about the 15th year, after which the growth of theFemale proceeds at a much diminished rate, whilst that of the Male continuesin nearly the same degree, until about the age of 19 years. It appears, then,that the Female comes to her full development in regard to Height, earlierthan does the Male. It seems probable, from the observations of Quetelet,that the full Height of the Male is not generally attained until the age of * Op. cit. COMPARISON OF MALE AND F

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1881

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