Preface- Paragraph 8 T

Throughout these years, I have enjoyed the financial support of the National Institutes of Health, U. S. Public Health Service, grants MH-02921, M-5268, 1-K-3-MH-21700, and National Science Foundation GS-300. Finally,I would like to express my gratitude to Eleanor F. Rosenberger, who has been responsible for typing and retyping the manuscript, for a gigantic editorial job and for patient library research.

Cambridge, Mass. E.H. L.

整整這些年來，我享有了來自美國國家衛生院及美國公共衛生服務處財務上的資助，補助了研究計劃MH-02921、M-5268及1-K-3-MH-21700，美國國家科學基金會補助了研究計畫GS-300。最後，我想表達我對Elanor F. Roseberger的感激之情，他負責了打字及校正原稿、大量的編輯工作以及耐心的圖書研究。