Eminent physicist, born in Edinburgh, son of John Clerk Maxwell of Middlebie; attained the rank of senior wrangler at Cambridge; became professor in Aberdeen in 1856, in London in 1860, and of Experimental Physics in Cambridge in 1871; in this year appeared the first of his works, "The Theory of Heat," which was followed by "Electricity and Magnetism" and "Matter and Motion," the second being his greatest; he was as sincere a Christian as he was a zealous scientist (1831-1879).