Chapter II: Preface: vii

I. THE STORY OF DEBORAH 1

II. THE DATA 13

THE CHARTS 33

III. WHAT IT MEANS 50

IV. FURTHER FACTS ABOUT THE KALLIKAK FAMILY 70

V. WHAT IS TO BE DONE? 101

LIST OF ILLUSTRATIONS

DEBORAH KALLIKAK AS SHE APPEARS TO-DAY AT THE
TRAINING SCHOOL _Frontispiece_

FACING PAGE

DEBORAH AT THE SEWING MACHINE 4

DEBORAH AS WAITRESS 4

SPECIMENS OF DEBORAH’S HANDIWORK 6

DEBORAH, AGED FIFTEEN 8

DEBORAH, AGED SEVENTEEN 8

LAST HOME OF MILLARD KALLIKAK 20

ESTHER, DAUGHTER OF “DADDY” KALLIKAK 20

RUINS OF MOUNTAIN HUT BUILT BY MARTIN KALLIKAK, JR. 24

SITE OF MOUNTAIN HOME OF MILLARD KALLIKAK 24

GREAT-GRANDSON OF “DADDY” KALLIKAK 84

MELINDA, DAUGHTER OF “JEMIMA” 84

GREAT-GRANDCHILDREN OF “OLD SAL” 88

CHILDREN OF GUSS SAUNDERS, WITH THEIR GRANDMOTHER 88

THE KALLIKAK FAMILY

A STUDY IN THE HEREDITY OF FEEBLE-MINDEDNESS