A Short Biographical Dictionary of English Literature/Hartley, David
Hartley, David (1705-1757). -- Philosopher, b. at Luddenden, Yorkshire, and ed. at Camb., studied for the Church, but page 180owing to theological difficulties turned to medicine as a profession, and practised with success at various places, including London and Bath. He also attained eminence as a writer on philosophy, and indeed may be said to have founded a school of thought based upon two theories, (1) the Doctrine of Vibrations, and (2) that of Association of Ideas. These he developed in an elaborate treatise, Observations on Man, his Frame, his Duty, and his Expectations. Though his system has long been discarded, its main ideas have continued to influence thought and investigation.