To Superintendent Edward R. Johnstone, whose wisdom and foresight led to the establishment of this Department of Research, whose help, sympathy, and encouragement have been constant throughout the work of preparing this study, the thanks and gratitude of the entire group of readers who find in these facts any help toward the solution of the problems that they are facing, are due.
HENRY H. GODDARD.
Vineland, N.J., September, 1912.
CONTENTS
| PAGE | ||
| 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] |