CHRYSTAL, GEORGE (1851-1911), British mathematician, was born near Aberdeen March 8 1851. He was second wrangler at Cambridge in 1875, and was appointed successively professor of mathematics at St. Andrews in 1877 and at Edinburgh in 1879, holding the latter post till his death. He was the author of a standard treatise on algebra as well as of many publications on physical and mathematical subjects, and his researches into the surface oscillations of Scottish lakes won him a Royal medal from the Royal Society. He died at Edinburgh Nov. 3 1911.