cially attracted his attention, and he came to be persuaded that elements usually regarded as chemically simple and primary were transmutable into each other. Believing that he could demonstrate this in the case of carbon and silicon, he became a candidate for the chair of chemistry in Edin burgh university in 1843 ; but he withdrew his application on finding his proof inconclusive. In 1849 he delivered in Edinburgh a series of lectures of great value on the history of chemistry from the earliest times to Lavoisier. In 1850 he published the tragedy of Galileo, Avhich had considerable merit. He was also an occasional contributor of articles on general literature as well as on subjects con nected with his favourite science to the leading reviews. His time, however, was chiefly spent in his laboratory; and at the date of his death in 185G he believed that he was within a very little of demonstrating the great funda mental theory in which his own faith had never wavered. Though his work was thus left incomplete, he did enough to entitle him to a place in the foremost rank of those who have cultivated the higher chemistry. An interesting col lection of his essays and papers, which display general literary power of a very high order, was published in two
volumes in 1858.BROWN, Thomas, of facetious memory, as Addison designates him, was the son of a farmer at Shiffnal in Shropshire, and was born in 1663. He was entered at Christ Church College, Oxford, whence he was soon obliged to abscond on account of the irregularities of his life. He was for some time schoolmaster at Kingston-on-Thames, and afterwards went to London, where he had recourse to the usual refuge of half-starved wits scribbling for bread. He published a great variety of poems, letters, dialogues, itc., full of humour and erudition, but coarse and indelicate. Though a good-natured man, he had the unhappy quality of preferring rather to lose his friend than his joke. He died in 1704, and was interred in the cloister of West minster Abbey. An incomplete edition of his works was published in 1707, in 4 vols. 12mo.
BROWN, Dr Thomas, one of the most original and subtle of Scottish psychologists, was born on the 9th January 1778, at Kirkmabreck, Kirkcudbright, of which parish his father was the clergyman. In 1780 the family removed to Edinburgh, but he was not placed at any of the schools in that city. At the age of seven he was sent to London, and began his regular education at a school in Camberwell, from which he was soon afterwards removed to Chiswick. At Chiswick he was thoroughly grounded in classics, and began to give promise of great ability, par ticularly in the department of verse composition, one of his school poems being deemed worthy of insertion in a magazine. He was a boy of a refined, gentle nature, intensely studious, a devourer of literature of all kinds, and much loved by his companions. After attending two other schools at Bromley and Kensington, he returned to Edin burgh, and in 1792 began his course at the university by joining the logic class, then conducted by Professor Finlayson. During the summer of 1793 he made acquaint ance with Dugald Stewart s Philosophy of the Human Mind, and found himself irresistibly attracted towards metaphysical speculation. He joined Stewart s class, that of moral philosophy, in the following session, and quickly introduced himself to the professor s notice by reading to him a paper of objections to one of his theories, marked by great acuteness and ability. His attendance on the classes at the university seems to have been somewhat desultory ; it does not appear that he ever passed through the regular curriculum of arts studies. But he carried on his reading with great vigour, and while still a student made his first appearance in the arena of philosophical disputation. His attention had been drawn towards Darwin s Zoonomia, which was then exciting a lively sensation in the literary world. His remarks on this book were published in 1798, and were received with great approval as one of the best and most mature examinations of the theory. His next contribution to literature was an article in the second number of the Edinburgh Review on the philosophy of Kant. It is acute, like all that Brown ever wrote, but it shows neither sufficient knowledge nor adequate apprecia tion of the philosopher it handled. Meantime he had been devoting himself to the study of medicine, having relin quished that of law, to which for a while he had applied. His graduation thesis, De Somno, which was thought worthy of being published, is a fine piece of psychologico- medical analysis. A few months later appeared two volumes of his poems, which were not received with much favour. Nor did his later poetical efforts attain much popularity, with the partial exception of the Paradise of Coquettes. They all show refined feeling and sweetness of diction, but they are wanting in the elements of true poetry. They are faint echoes of Akenside and Beattie, neither of whom can stand much dilution. Brown s real strength lay altogether in metaphysical analysis, and a favourable opportunity for calling it forth soon presented itself. Some captious objections had been raised against the appointment of the celebrated Leslie to the professorship of mathematics, on the ground that he had approved of Hume s doctrine of causality. The Humian theory was believed to lead inevit ably to scepticism and infidelity, and these consequences were, of course, charged upon Leslie. Brown undertook the defence not of Leslie but of Hume, and in his examina tion of Hume s doctrine showed that in reality the theory was in no way inimical to the interests of true religion or theology. This examination, at first but a pamphlet, swelled out in its third edition (1818) into a bulky treatise, Inquiry into the Relation of Cause and Effect, containing not merely a criticism of Hume, but an elaborate theory of the causal relation. This relation Brown regards as nothing but constancy of antecedence and sequence, while at the same time he admits an intuitive belief in the permanency or universality of the causal connection. The work is a fine specimen of Brown s faculty of analysis, which it exhibits in its very best aspect.
a physician, having been received into partnership with Dr Gregory ; but though very successful in his profession, he was by nature more strongly attracted towards a literary life. He had twice failed in his application for a profes sorship in the university of Edinburgh, when in the session 1 808-9 he was called upon to deliver a few lectures to the class of moral philosophy, in consequence of the temporary illness of Dugald Stewart. In the following year, Stewart s health still incapacitating him from active exertion, Dr Brown delivered the lectures for the greater part of the session. His success in conducting the class was unequivocal; the enthusiasm of the students was such as one reflects on with a little wonder. They were fascinated not more by the splendid rhetoric of the lecturer than by the novelty and ingenuity of the views presented. In the summer of 1810 it was resolved to appoint Brown as colleague to Dugald Stewart, and in the ensuing session he began his course as professor of moral philosophy. During the few remaining years of his life he published only his poems, but he was busily engaged in preparing an abstract of his lectures to serve as a handbook for the class. His health, never strong, gave way completely under the pressure of his work. A voyage to London, which had been recom mended, proved of no avail, and he died on the 2d April 1820, at the early age of forty-two. After his death were published the first part of his proposed text -book, Physiology
of the Human Mind, and the Lectures on the Philosophy
