It was discovered that for any given inhabited area of the world there was an average cephalic index of the population. More important, it was learned, through measurements on immigrants to America from every part of Europe, and then on their children born in America, that this cephalic index adheres to the soil and immediately makes itself manifest in the next generation.Thus long-headed Jews from Sicily, and short-headed ones from Germany, produced offspring with the same average head measure, the specifically American one.
Bodily size and span of growth were two other characteristics in which all types whatever in America, Indians, Negroes, white men, were found to have the same average, regardless of average size and growth-span of the countries or stocks from which they came. In the case of Irish immigrants, coming from a country of a very long growth-span, the response to the local influence was immediate.
Imperium, 'Race, People, Nation, State'
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