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  4. Ellsworth Huntington
  5. The Negro, however, has been tested on an extensive scale.

The Negro, however, has been tested on an extensive scale.

Ellsworth Huntington
Scales, Has Beens, Tested
Ellsworth Huntington (2016). “A Chronicle of Aboriginal America: Juvenile History - - American”, p.3, VM eBooks
The Negro, however, has been tested on an extensive scale.