Students discuss how "ideas that a society mistakenly believes to be scientific can be used to promote social prejudice and discrimination." An etched image (ca. 1840) of an Irish immigrant's "broad, low head" clearly shows "exceedingly deficient moral organs -- especially benevolence."
This URL downloads all 16 pages of Middle Level Learning as a pdf of about 0.7 MB:
* http://members.ncss.org/mll/04/mll04.pdf