Use-inheritance illustrated by the direction of hair on the bodies of animals / by Walter Kidd.

Date:
1901
Catalogue details

Licence: In copyright

Credit: Use-inheritance illustrated by the direction of hair on the bodies of animals / by Walter Kidd. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

    49/56 page 45
    SUMMARY 1. To understand the disposition of hair on living animals, it is necessary to look upon it as a stream, and this is very plastic. 2. In Man, and various groups of animals, the great majority of the peculiarities here noted are congenital. 3. Certain peculiarities of hair-slope are at present in process of development. 4. The hair-streams are disposed in the lines of least resist- ance. 5. The mechanical conditions required for the production both of the general and special hair-slopes are in present opera- tion. 6. The hair-slope can be modified during the life of an individual. 7. Selection (whether natural, sexual, or germinal) is in- competent to produce these peculiarities of hair-slope. 8. If these were not originally created with the forms of life which present them, they must have been produced in ancestors by use or habit.
    digitised image 1
    digitised image 2
    digitised image 3