He was born on 1 April 1848 in Glasgow, the son of William Muir and his wealthy wife, Margaret Moncrieff Pattison. Muir was educated at Glasgow High School then studied Sciences at the
University of Glasgow and
University of Tübingen. For a short period after his studies, he was a
Demonstrator at
Anderson's College, Glasgow in Sir
Edward Thorpe's laboratory, and also at
Owens College, Manchester under Sir
Henry Roscoe. In 1873 he married Florence Haslam. In the same year he was elected a Fellow of the
Royal Society of Edinburgh. His proposers were
William Thomson. Lord Kelvin,
James Thomson Bottomley, Sir
Thomas Edward Thorpe and
James Young. He resigned from the Society in 1889. In 1877 he was appointed
Praelector at Gonville and Caius College, Cambridge, and in 1881 elected a Fellow of the college. He then became head of the Caius Laboratory here, a position he held until 1908, when he retired. In a 1993 book, historian of science
Mary Jo Nye described Muir's chapter on
affinity from his
History of Chemical Theories and Laws as "still valuable treatment of the topic". He died on 2 September 1931. ==Publications==