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RAMSEY, SIR ANDREW CROMBIE (18141891) ,' British geologist, was born at Glasgow on the 31st of January 1814, being the son of William Ramsay, manufacturing chemist. He was for a time actually engaged in business, but from spending his holidays in Arran he became interested in the study of the rocks of that island, and was thus led to acquire the rudiments of geology. A geological model of Arran, made by him on the scale of two inches to the mile, was exhibited at the meeting of the British Association at Glasgow in 184o, and attracted the notice of Sir R. I. Murchison, with the result that he received from De la Beche an appointment on the Geological Survey, on which he served for forty years, from 1841 to 1881. He was first stationed at Tenby, and to that circumstance may be attributed the fact that so much of his geological work dealt with Wales. His first book, The Geology of the Isle of Arran, was published in 1841. In 1845 he became local director for Great Britain, but he continued to carry on a certain amount of field-work until 1854. To the first volume of the Memoirs of the Geological Survey (1846) he contributed a now classic essay, " On the Denudation of South Wales and the Adjacent Counties of England," in which he advocated the power of the sea to form great plains of denudation, although at the time he under-estimated the influence of subaerial agents in sculpturing the scenery. In 1866 he published The Geology of North Wales (vol. iii. of the Memoirs), of which a second edition was published in 1881. He was chosen professor of geology at University College, London, in 1848, and afterwards lecturer in the same subject at the School of Mines in 1851. Eleven years later he was elected to the presidential chair of the Geological Society, and in 1872 he succeeded Murchison as director-general of the Geological Survey. In 188o he acted as president of the British Association at Swansea, and in the following year retired from the public service, receiving at the same time the honour of knighthood . In 186o he published a little book entitled The Old Glaciers of Switzerland and North Wales. The study of this subject led him to discuss the Glacial Origin of Certain Lakes in Switzerland, the Black Forest, &c. He dealt also with the origin of The Red Rocks of England (1871) and The River Courses of England and Wales (1872). He was especially interested in tracing out the causes which have determined the physical configuration of a district , and he devoted much attention to the effects produced by ice, his name being identified with the hypothesis, which, however, has never commanded general assent, that in some cases lake basins have been scooped out by glaciers. A master in the broader questions of stratigraphy and physical geology, he was a dear exponent of facts, but rather impatient of details, while hisoriginal and often bold theories, expressed both in lectures and in writings, stirred others with enthusiasm and undoubtedly exercised great influence on the progress of geology. His lectures to working men, given in 1863 in the Museum of Practical Geology, formed the nucleus of his famous Physical Geology and Geography of Great Britain (5th ed., 1878; 6th ed., by H. B. Woodward, 1894). He received a Royal medal in 188o from the Royal Society, of which he became a fellow in 1862; he was also the recipient of the Neill prize of the Royal Society of Edinburgh in 1866, and of the Wollaston medal of the Geological Society of London in 1871. He died at Beaumaris on the 9th of December 1891.
See Memoir, by Sir A. Geikie , 1895.
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