pendent of the stimulus produced by outward impressions, is a primary fact of our constitution. Among the Senses, have been here enrolled and described with some degree of minuteness the feelings connected with the various processes of organic life, -Digestion, Respiration, &c.-which make up so large a part of individual happiness and misery. A systematic plan has been introduced into the description of the conscious states in general, so as to enable them to be compared and classified with more precision than heretofore. However imperfect may be the first attempt to construct a Natural History of the Feelings, upon the basis of a uniform descriptive method, the subject of mind cannot attain a high scientific character until some progress has been made towards the accomplishment of this object. In the department of the Senses, the Instincts, or primitive endowments of our mental constitution, are fully considered; and in endeavouring to arrive at the original foundation, or first rudiments, of Volition, a theory of this portion of the mind has been suggested. In treating of the Intellect, the subdivision into faculties is abandoned. The exposition proceeds entirely on the Laws of Association, which are exemplified with minute detail and followed out into a variety of applications. LONDON, June, 1855. TABLE OF CONTENTS. 1. Connexion of mental processes with bodily organs 2. Proofs that the Brain is the principal organ of Mind PAGE (3.) Products of nervous waste increased by excitement ib. (4.) Connexion of size of brain with mental energy 4. Nervous substance of two kinds, white and grey Nerve fibres and nerve vesicles ib. ib. 34 Functions of the Nerves. II. Division into Spinal and Cerebral Nerves 18. Automatic or reflex actions and their centres (4.) Muscular tone Experiments on the tonicity of muscle Functions of the lesser grey centres of the Brain. 19. Uncertainty of the functions of these bodies Importance of the white matter of the brain 55 56 Of the Nerve Force and the Course of Power in the Brain. A closed circuit not necessary Waste of nerve fibre by the act of conduction ib. ib. 985 Classification of muscular sensibilities 4. Irritability or Contractility of Muscle |