Skip to main content
Garrison-Morton-Norman History of Medicine
DOWN, John Langdon Haydon (1828 – 1896)

DOWN, John Langdon Haydon (1828 – 1896)

1828 – 1896

1 entries in the GMN corpus.

Image source Sydney Hodges · St. George's University of London ( en.wikipedia.org ) · Public domain

Sort by YearSort by Title

1866 CE

#4936

Observations on an ethnic classification of idiots.

DOWN, John Langdon Haydon (1828 – 1896)
DOWN, John Langdon Haydon (1828 – 1896)

Langdon Down suggested that the physiognomical features of certain defectives enabled them to be arranged in ethnic groups; of these he differentiated Mongolian, Ethiopian, Caucasian, and American Indian. Such an ethn…