LORD KELVIN'S successor in the Chair of Natural Philosophy in Glasgow University was born at Lochgelly, Fifeshire, in 1847, and received his early education in the Subscription School of his native place. After private tuition later he entered Glasgow University, where he earned the Eglinton Fellowship in Mathematics in 1876, and so gained the confidence of Sir William Thomson, afterwards Lord Kelvin, that he appointed him as private secretary and assistant. This post he held till 1880, when he became official assistant to the Professor of Natural Philosophy. In 1884 he gave up the appointment to become Professor of Physics in the University College of North Wales. And on 5th October, 1899, he returned to Glasgow as successor to his old chief in the Chair of Natural Philosophy.
    Professor Gray is the author of various scientific papers, and among his publications are "Absolute Measurements in Electricity and Magnetism" and "Theory and Practice in Absolute Measurement in Electricity and Magnetism." He is M.A. and LL.D., as well as a Fellow of the Royal Society.

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