African Americans Cotton growing Economic aspects History Indians of North America Medicine Origin Physicians Slavery %SP3 Afro-Americana Asylums Biography Black race Black writers Care Colonization Cotton growing and manufacture Hessian fly Historical Society of Pennsylvania--Speeches and lectures Indians Larvae Medicine--Practice--19th Century Mentally ill Mortality Physicians--Philadelphia--19th century Poor Prisons Psychiatric hospitals Societies, etc St. Clair's Campaign, 1791