Frontmatter -- Foreword -- Preface and acknowledgements -- Contents -- Jamaica project staff -- CHAPTER I. Introduction -- CHAPTER II. Notes on the ethnohistory of cannabis -- CHAPTER III. Ganja legislation -- CHAPTER IV. The ganja complex -- CHAPTER V. Acute effects of ganja smoking in a natural setting -- CHAPTER VI. The clinical studies -- CHAPTER VII. Respiratory function and hematology -- CHAPTER VIII. Psychiatry and electroencephalography -- CHAPTER IX. Psychological assessment -- CHAPTER X. Attitudes and reactions to ganja -- CHAPTER XI. Cultural expectations and predisposition to ganja -- CHAPTER XII. Cannabis, society and culture -- Appendices: I-VIII -- Bibliography