Produced by Martin Pettit and the Online Distributed Proofreading Team at http://www.pgdp.net (This book was produced from scanned images of public domain material from the Google Print project.) SOUND MIND; OR, _CONTRIBUTIONS_ TO THE NATURAL HISTORY AND PHYSIOLOGY OF THE HUMAN INTELLECT. By JOHN HASLAM, M.D. LATE OF PEMBROKE HALL, CAMBRIDGE: FORMERLY PRESIDENT OF THE ROYAL MEDICAL, NATURAL HISTORY, AND CHEMICAL SOCIETIES OF EDINBURGH. LONDON: PRINTED FOR LONGMAN, HURST, REES, ORME, AND BROWN, PATERNOSTER-ROW. 1819. Printed by Strahan and Spottiswoode, Printers-Street, London. TO SIR JAMES MACKINTOSH, M.P. DEAR SIR, The privilege of long acquaintance, and a sufficient experience of the kindness of your disposition, might be an adequate inducement to dedicate the following pages to your notice. To this offering, I am however impelled by motives, which boast a higher descent, and more enlightened character:--an admiration of your superior talents, and the adaptation of those excellent endowments, to the advancement and happiness of the human race,--and by which you have been enabled "The applause of listening senates to command." The subjects to which I now solicit the permission of prefixing your name, were once your favourite study; and I am induced to consider your profound researches into the nature and constitution of the human intellect, as the basis of that high reputation, you now so deservedly maintain among the wise and dignified of your contemporaries. I am, Dear Sir, with respect, esteem, and the kindest feelings, Your very obedient servant, JOHN HASLAM. PREFACE.