nigrescence

Thousands of years of effort to throw off their nigrescence have failed to eradicate those race characteristics, and the Jew of to-day is essentially Negro in habits, physical peculiarities and tendencies. . .

A Renegade History of the United States Thaddeus Russell 2010

The overture (op. 22) has won the high esteem of A.J. Goodrich, and it seems to me to be one of the most important of native works, not because of its nigrescence, but because of its spontaneity therein.

Contemporary American Composers Being a Study of the Music of This Country, Its Present Conditions and Its Future, with Critical Estimates and Biographies of the Principal Living Composers; and an Abundance of Portraits, Fac-simile Musical Autographs, and Compositions Rupert Hughes 1914

Joan's fair limbs spoke of blood not Cornish, of days far past when a race of giants swept up from behind the North Sea to tread a new earth and take wives of the little dark women of the land, abating the still prevalent nigrescence of the Celt with

Lying Prophets Eden Phillpotts 1911

Even the relation of nigrescence to tropical heat, which seems to be established by the geographical distribution of negroid races in the Old World, fails to find support from the facts of pigmentation among the American Indians from Alaska to Tierra del Fuego.

Influences of Geographic Environment On the Basis of Ratzel's System of Anthropo-Geography Ellen Churchill Semple 1897

The general fact of increasing nigrescence from temperate towards equatorial regions is conspicuous enough, despite some irregularity of the shading. [

Influences of Geographic Environment On the Basis of Ratzel's System of Anthropo-Geography Ellen Churchill Semple 1897