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Scientific investigation at the McLean Hospital started in 1888, when the hospital established laboratories and facilities for the study of pathology, psychology, microbiology and chemistry. Never before had research laboratories been placed within the clinical setting of a psychiatric institution in the United States, and possibly the world. For over a century the evolution of the McLean research program has led to a unique confluence of clinical and laboratory resources for the study of psychiatric disorders. The following timeline illustrates some of the milestones of research at McLean.

The Nineteenth Century

The Twentieth Century and Today