...That the migration or importationof such persons as any of theStates now existing shall think properto admit, cannot be prohibited byCongress, prior to the year one thousandeight hundred and eight... 
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...Cessation offoreign migration has raised Negro men's wages, to be sure—but it hasnot only raised Negro women's wages, it has opened to them a score ofnew avenues of earning a living...
W. E. B. Du Bois 「Darkwater」
...After a lapse of perhaps thirty thousand years there entered Africaa further migration of Asiatic people, Negroid in many characteristics,but lighter and straighter haired than the primitive Negroes...
W.E.B. Du Bois 「The Negro」
...They beat against the barriers north, northeast, and west, but graduallysettled into a great southeastward migration...
W.E.B. Du Bois 「The Negro」
...They found partially disrupted Negro states on the west coastand falling empires in the Sudan, together with the old unrest ofover-population and migration in the valley of the Congo...
W.E.B. Du Bois 「The Negro」
...The migration of the Bantu is the first clearly defined movementof modern times...
W.E.B. Du Bois 「The Negro」
...North of the Zambesi, in British territory, the chief role in recenttimes has been played by the Bechuana, the first of the Bantu toreturn northward after the South African migration...
W.E.B. Du Bois 「The Negro」
...It was characterized bya large migration to the towns...
Booker T. Washington 「The Negro in the South」
...In Venice, which was visited in October and November, during thefall migration, he found on sale in the markets, as food, thousandsof songbirds...
William T. Hornaday 「Our Vanishing Wild Life」
...
: A few elk, by migration from the Park; a few deer, and bear of two species...
William T. Hornaday 「Our Vanishing Wild Life」
...As such migration is likely to happenwhenever a species becomes extremely abundant it probablyis Nature's way of providing for an extended foodsupply for the succeeding generations...
Clarence M. Weed 「Butterflies Worth Knowing」
...It is found in open thorny woods and thickets; and in Buenos Ayresseems to have a partial migration, as it is much more common insummer than in winter...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
...I had never beforeobserved any later or supplementary migration like this; for, as a rule,the causes which in some years delay the departure of birds seemsto affect them all alike...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
...It has, I fancy, a limited migration, as I could neverfind one in winter...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
...These birds have no migration, but pair for life, and always remainon the same spot, and will continue to breed in the same hole for manyyears, even where they are frequently deprived of their eggs...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
ランダム例文：
interfere slayer counts
便利！手書き漢字入力検索
この漢字は何でしょう？？