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RESEARCHES OF THE HONOURABLE HENRY CAVENDISH, F.R.S. Written between 1771 and 1781, Edited from the original manuscripts in the possession of the Duke of Devonshire, K.G., by J. CLERK MAXWELL, F.R.S. [Nearly ready.

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AN ELEMENTARY TREATISE ON QUATERNIONS. By P. G. TAIT, M.A., Professor of Natural Philosophy in the University of Edinburgh; formerly Fellow of St Peter's College. Cambridge. Second Edition. Demy 8vo. 145.

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TREATISE

ON

NATURAL PHILOSOPHY

BY

SIR WILLIAM 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

PETER GUTHRIE TAIT, M.A.,

PROFESSOR OF NATURAL PHILOSOPHY IN THE UNIVERSITY OF Edinburgh,
FORMERLY FELLOW OF ST PETER'S COLLEGE, CAMBRIDGE.

VOL. I. PART I.

NEW EDITION.

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1879

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