In an effort to highlight the type and extent of research in schizophrenia in the United States during the past 190 years various references have been described according to certain categories of investigation. While no single review of all the studies which comprise the literature to date is intended, it is believed that from a historical standpoint the present contribution may be of interest and use. The research projects reported all contain bibliographies which in themselves are additionally representative of many studies of importance and of the scope of the subject under consideration.Abstract Teaser