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Scope and Contents From the Collection: The collection consists of eleven series. The bulk of the correspondence comprises letters of both professional and personal natures from 1925 to 1984. A substantial portion of the collection consists of Spiegels' research files pertaining to stereographic procedures, Parkinsons' disease, and other areas of neurological investigation. The research files contain correspondence, reports, experimental data summaries, and bibliographic materials collected during Spiegel's tenure at Temple and later...