applicable to the human race.

The writer regrets that it is impossible here to acknowledge all his
obligations to those who have assisted him in the preparation of this
work. Such acknowledgement is due to the many genealogists and other
friends who have kindly furnished detailed cases of consanguineous
marriage. For more general data the writer is especially indebted to
Dr. Alexander Graham Bell, to Dr. Martin W. Barr, to Professor William
H. Brewer of Yale University, and to Dr. Lee W. Dean of the University
of Iowa. In the preparation of the manuscript the suggestions and
criticisms of Professors Franklin H. Giddings and Henry L. Moore have
been invaluable.

G.B.L.A.

MARCH, 1908.




CONTENTS


CHAPTER I

INTRODUCTION

Problems to be Treated--Degrees of Consanguinity--Literature of the
Subject--Noah Webster--Bemiss--Dally--G.H. Darwin--Huth--Bell--Legal
Status in the United States--Methods of