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Rh form of presenting them, debarred any, save those whose knowledge was sufficiently extended, from following him in his exposition. But, by the students who enjoyed the privilege of attending his lectures, he was regarded as a teacher of the greatest value, though at times somewhat difficult to follow. Of a kindly and genial disposition, Professor Maxwell secured the affectionate regard of those with whom he came in contact, and to many his death comes as the double loss of a companion in work and of a valued friend.

Professor Maxwell was born in the year 1831, being the only son of John Clerk Maxwell, Esq., of Middlebie, Dumfriesshire, Scotland. When eight years old his mother died, and his father thereafter lived a retired life on his estate, devoting himself to the education of his son and the care of his property. He received his early education at the Edinburgh Academy, and after leaving there entered the University of Edinburgh. In 1850 he went to Cambridge, from which he was graduated in 1854, as second wrangler. In the following year he became a Fellow of Trinity College, and a year later accepted the position of Professor of Natural Philosophy in Marischal College, Aberdeen, which he held until the fusion of this and King's College. He succeeded Professor Goodeve as Professor of Natural Philosophy and Astronomy in King's College in 1860, and remained there until the death of his father in 1865, when he retired to his estate in Scotland. None of these positions had been entirely in accordance with his tastes, or such as to give full scope to his abilities. Such an opportunity as in every way suited him was opened to him in 1871, by the invitation of the University of Cambridge to the newly created chair of Experimental Physics, which he held until the time of his death. Shortly after his acceptance of the position, the Cavendish Laboratory, with a complete equipment of apparatus, was presented to the university by the Duke of Devonshire, and it is due to the superintendence of Professor Maxwell that this laboratory is so excellently adapted to its purpose.

During the winter of 1878 and 1879 Professor Maxwell's health failed him, and in the spring he betook himself to Scotland in the hope of regaining it. He was not improved by his trip, and he therefore returned to Cambridge, where under the treatment of Dr. Paget he grew better, and hopes were entertained of his recovery. The improvement, however, was not lasting, and he rapidly grew weaker until his death, on the 5th of November last.

Professor Maxwell commenced original work at an early age, and his contributions to the “Transactions” of societies and scientific periodicals have been voluminous. A mathematical paper “On the Description of Oval Curves, and those having a Plurality of Foci,” was submitted by him to the Royal Society of Edinburgh, through Professor Forbes, before he was fifteen. While at the University of Edinburgh he contributed two elaborate papers to the Edinburgh Royal Society,