FROM THE PAINTING BY D. O. HILL, R.S.A.

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DR. CHALMERS. (After the Portrait by John Faed, R.S.A.)

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In Ireland Roman Catholicism was represented by Archbishop Murray and Dr. Doyle, the eloquent Bishop of Kildare. The majority of the Irish Churchmen were Evangelical, and hence came often into collision with Archbishop Whately, who was a powerful supporter of the system of mixed education. The Scottish Churches at that time possessed a number of ministers of great power and eminence, each exerting in his own denomination extensive influence. Dr. Andrew Thomson, a mighty spirit, had reached the meridian of his great popularity. Dr. Chalmers was rising fast to the commanding position he so long occupied. Among the Baptists the most important names were those of two laymen, James and Robert Haldane, who not only preached throughout Scotland, but organised a vast missionary scheme for India. In the United Presbyterian Church the ablest man was Dr. John Brown, of Edinburgh, wielding great influence as a theological professor, and as the pastor of a large congregation in that city. In Glasgow the Rev. Greville Ewing had founded the Independent Church, then new to Scotland. Associated with him was a man not less gentle in spirit, but with intellectual power much more commanding, and of the highest cultivation as a theologian—Dr. Wardlaw, who during his life continued the foremost man among the Scottish Congregationalists. Dr. Russell, of Dundee, possessing an intellect of great force, with an energetic temperament, contributed his share to the great controversy which continued for a number of years to agitate the whole Scottish nation, till it issued in the disruption, and in the establishment of the Free Church. That movement had already begun, and the decision of the House of Lords in the Auchterarder case had made the schism inevitable. Among English Nonconformists the greatest names of the Independents were those of Dr. Fletcher, of Finsbury Chapel, John Burnet, of Camberwell, John Angell James, of Birmingham, and William Jay, of Bath. John Williams was preaching the Gospel to the Melanesians, and Dr. Moffat in South Africa. The Baptists could boast Robert Hall, and the essayist John Foster; their greatest missionary was perhaps Dr. Carey. Of the leading Wesleyans we may notice the names of Dr. Bunting and Dr. Adam Clarke. The two chief events which affected that body during the period were—the secession in 1834, when Dr Warren and his followers, called "Warrenites," separated from the Conference, and the last secession, when 100,000 broke off, forming a new community. All the seceding bodies—the Kilhamites, or New Connexion Methodists; the Bible Christians, or Bryanites; the Wesleyan Methodist Association, formed in 1835; and last, the Wesleyan Methodist Reformers—separated on the alleged ground of the tyrannical powers exercised by the Conference, and the exclusion of the laity from their due share in the management of the body.

Until the beginning of the nineteenth century the state of mathematical science was very low in England. The commencement of a better era originated with Woodhouse at Cambridge and Playfair in Edinburgh, by both of whom the Continental methods were introduced into the studies of their respective Universities. About 1820 the translation of La Croix's "Differential Calculus," superintended by Sir John Herschel and Dean Peacock, came into use as a text-book. Soon afterwards the writings of Laplace and Poisson were generally read in the Universities; and a few men of active and daring minds, chiefly of the Cambridge school, such as Professor Airy and Sir John Lubbock, grappled with the outstanding difficulties of physical astronomy; whilst a larger number applied themselves to the most difficult parts of pure analysis, and acquired great dexterity in its use, in the solution of geometrical and mechanical problems.

Sir John F. W. Herschel, son of Sir William Herschel, conversant with almost every branch of science, also devoted himself with remarkable success to the cultivation of sidereal astronomy. He evinced very early a taste for mathematics, but did not devote himself to astronomy until after his father's death in 1822. He then gave himself up to it without reserve. At that period the Southern Hemisphere was to astronomers little more than an unknown region. For the purpose of exploring it, he visited the Cape of Good Hope in 1834, where, making use of his father's method, he continued his observations for more than four years, examining with great care, among other things, the nebulæ and double stars. On his return to Europe, he gave the results of his labours to the world in a work of deep interest, and of the highest importance; and the value of the services he had rendered to science was recognised, not only by the scientific world, but by his Sovereign also, who created him a baronet. After he was appointed Master of the Mint, in 1850, he took no further part in practical astronomy, but he published many excellent works, not only on that subject, but on science generally; and he displayed a thorough acquaintance with natural history, the belles-lettres, and the fine arts, and translated a portion of the "Iliad." This great astronomer and mathematician died in May, 1871. Lord Rosse's labours to improve the telescope commenced about 1828, and continued unremittingly until 1844. His masterpiece was of six feet aperture and 54 feet in focal length.

Amongst the foremost of the promoters of science, and the most eloquent of its expounders, was Sir David Brewster, who died full of years and of honours in 1868. Arrived at manhood at the opening of the present century, having been born in 1781, he continued his brilliant course during fifty years, pursuing his investigations into the laws of polarisation by crystals, and by the reflection, refraction, and absorption of light, in which he made important discoveries. The attention of the British public was forcibly arrested by an able treatise on "Light," contributed by Sir John Herschel, in 1827, to the "Encyclopædia Metropolitana." Its excellent method and lucid explanations attracted to the theory of Young and Fresnel men of science who had been deterred by the fragmentary and abstruse style of the former. This was followed four years later by a most able and precise mathematical exposition of the theory, and its application to optical problems, by Professor Airy, who became Astronomer-Royal in 1835.