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G. W. Tyrrell, A.R.C.Sc., Ph.D., D.Sc., F.R.S.E., F.G.S.—By the death of G. W. Tyrrell on 20 July, 1961, our Society lost a distinguished member. Born in Watford, Hertfordshire in 1883, he was educated at Watford Grammar School. Thereafter he studied geology at the Royal College of Science under Professor J. W. Judd from whom he probably acquired the interest in igneous rocks and their genesis which was to fill his life and to bring him an international reputation.

His association with Glasgow commenced in 1906 when he became Assistant to Professor J. W. Gregory, the first holder of the Chair of Geology in the University. The remainder of his working life was spent in the service of the Department of Geology. He retired from the senior lectureship in 1948. In addition to his academic duties, Dr. Tyrrell undertook most willingly the task of lecturing to extra-mural classes. His success in this field was proved by the number of students who attended year after year. He had the invaluable quality of being able to adjust himself to the level of his audience without ever becoming commonplace. Nothing seemed to be too much trouble to him, answering all questions completely and courteously.

On his arrival in Glasgow he found himself in the midst of a most wonderful variety of igneous rocks, all practically undescribed. He threw himself into the task of remedying this state of affairs, and with remarkable facility and speed a succession of papers appeared. The amount of effort involved

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