On the naming and classification of mental diseases and defects / by Thomas Laycock.

  • Laycock, Thomas, 1812-1876.
Date:
1863
Catalogue details

Licence: Public Domain Mark

Credit: On the naming and classification of mental diseases and defects / by Thomas Laycock. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

    24/34 (page 22)
    Figs. 1 and 2, Plate III, show the geometrical evolution of the African skull, and of the degenerate European. In fig. 1, Plate I, the major axis of the ellipse, or oblate spheroid, is parallel to the vertical axis of the circle or sphere; but in proportion as it inclines to the latter a lower typical form is evolved. In fig. 1, Plate III, the spheroid is drawn at an inclination of 27° to the sphere, which Mr. Hay conceives to be its natural limit in man. Pig. 2, Plate III, shows the relative position of the parts which make up the base of such a skull, and which may be compared with fig. 2, Plate I. Figs. 1 and 2, Plate IV, show the inclined skull of fig. 1, Plate III, clothed with tlie cutaneous tissues and the organs of sense, according to the African and European type respectively, and demonstrate the difference of type which a difference in the sjft parts alone may indicate.