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ATOMIC ENERGY OF CANADA LIMITED

CHALK RIVER PROJECT CHALK RIVER, ONT.

November i1, 1960

Professor J. Lederberg
Department of Genetics
Stanford University
Medical Center

PALO ALTO, California

Dear Joshua:

Many thanks for your letter of October 25. Iam
delighted to hear of the consanguinity study and to know
something of the way in which you are carrying it out.

Our own files of vital records are still much too
limited for us to tackle the identification of consanguineous
marriages, However,” outs be extended in this direction
in the future since only two generations of marriage
registration forms are required to correctly identify a
marriage of first cousins.

With all best wishes,

Yours sincerely,

HBN/lh H. B. Newcombe
Head, Biology Branch

Iman

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