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Sent From (Definite): Franz Uri BoasSent To (Definite): Karl PearsonDate: 14 Oct 1897
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Holder (Definite): University College London: Special Collections
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Sent from Franz Uri Boas
14 Oct 1897
Description:
‘...
I am engaged in investigating the coefficients of regression on[?] several American types and I think there is clear evidence of a very sudden reduction in the value of the coefficients wherever there is evidence of mixture, so much so that the amount of the coefficient I think may be considered evidence of purity of race. I hope to publish the results of this investigation in the course of this winter. The coefficient of regression is high among Americans as compared to Europeans which agrees with the lesser amount of variability among our types. Wherever two distinct types adjoin there seems to be a sudden decrease in the value of the coefficient in the intermediate area. Judging from the material I collected here, I think it likely that the low coefficient you obtain for [illeg.] is due to the great mixture of types in that city.
Yours very truly,
Franz Boas.’
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Sent to Karl Pearson
14 Oct 1897
Description:
‘...
I am engaged in investigating the coefficients of regression on[?] several American types and I think there is clear evidence of a very sudden reduction in the value of the coefficients wherever there is evidence of mixture, so much so that the amount of the coefficient I think may be considered evidence of purity of race. I hope to publish the results of this investigation in the course of this winter. The coefficient of regression is high among Americans as compared to Europeans which agrees with the lesser amount of variability among our types. Wherever two distinct types adjoin there seems to be a sudden decrease in the value of the coefficient in the intermediate area. Judging from the material I collected here, I think it likely that the low coefficient you obtain for [illeg.] is due to the great mixture of types in that city.
Yours very truly,
Franz Boas.’