The cause and control of sex in human offspring.

  • Jackson, R. Clay.
Date:
1926
Catalogue details

Licence: Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)

Credit: The cause and control of sex in human offspring. Source: Wellcome Collection.

    173/222 (page 165)
    The Cause and Control of Sex 165 and towns of West Rutland, Proctor, Pittsford, Dorset, Swanton, and Barre, combined, produced 1635 females and but 1626 males ; a male sex ratio of .98 and an ex¬ cess above normal of 91 female births. i 379. PLATE 30 should afford ample proof that 1 am not in error in the statistical method adopted. Here are given the sex ratio curves for the towns of Wood¬ bury and Hardwick, Vermont. These two villages are five miles apart. All the quarrying is done in Woodbury and there is no other work engaged in. The stone is hauled to Hardwick and there cut and dressed. Thus practically all the labor in Woodbury is exposed out of doors while most of the labor in Hardwick is under shelter in the cutting sheds. Therefore, in sex produc¬ tion, there is an antithetical result. When labor was idle it