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A TREATISE ON NATURAL PHILOSOPHY. Volume I. 



By Sir W. THOMSON, LL.D., D.C.L., F.R.S., Professor of Natural Philosophy 

 in the University of Glasgow, Fellow of St Peter s College, Cambridge, and 

 P. G. TAIT, M.A., Professor of Natural Philosophy in the University of Edin 

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ELEMENTS OF NATURAL PHILOSOPHY. By Professors 

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AN ELEMENTARY TREATISE ON QUATERNIONS. By 



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