HARTLEY, David (1705-1757). Observations on man, his frame, his duty, and his expectations. London: S. Richardson for James Leake and WIlliam Frederick, Bath; and Charles Hitch and Stephen Austen, London, 1749.

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HARTLEY, David (1705-1757). Observations on man, his frame, his duty, and his expectations. London: S. Richardson for James Leake and WIlliam Frederick, Bath; and Charles Hitch and Stephen Austen, London, 1749.

8o (196 x 121 mm). Contemporary gilt-ruled sprinkled calf, gilt-ruled spines with red leather labels (joints cracked, spines dried).

FIRST EDITION. "A tour de force which considers every significant topic in neurophysiology and human and comparative psychology, explained in terms of the development of complex ideas and habits from simple sensations and their repeated juxtaposition in experience" (DSB). The author combined Locke's principle of the association of ideas, Gay's attempts to relate man's experiences of pleasures or pain to this principle, and ideas from Newton's Opticks concerning the reception by the brain and nerves of vibrations from light received by the eye. The author's most important work, and the first English work to use the word "psychology" in its modern sense. Wellcome III, p.215; Norman 1003.

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Please note that the work in this lot consists of 2 volumes in 2 parts.