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Stewart (B.).-Works by BALFOUR STEWART, F.R.S., Professor of Natural Philosophy in Owens College, Manchester :LESSONS IN ELEMENTARY PHYSICS. With numerous Illustrations and Chromolithos of the Spectra of the Sun, Stars, and Nebulæ. New Edition. Fcap. 8vo. 4s. 6d.

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6s. The book is one which well deserves the attention of thoughtful and religious readers. It is a perfectly sober inquiry, on scientific grounds, into the possibilities of a future existence."-Guardian.

PHYSICAL SCIENCE.

Stone.-ELEMENTARY LESSONS ON SOUND.

19

By Dr.

W. H. STONE, Lecturer on Physics at St. Thomas' Hospital. With Illustrations. Fcap. 8vo. 3s. 6d. Tait.-LECTURES ON SOME RECENT ADVANCES IN PHYSICAL SCIENCE. By P. G. TAIT, M.A., Professor of Philosophy in the University of Edinburgh. Second edition, revised and enlarged, with the Lecture on Force delivered before the British Association. Crown 8vo. 95. Tanner.-FIRST PRINCIPLES OF AGRICULTURE.

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THE VOYAGE OF THE "CHALLENGER."-THE ATLANTIC. A Preliminary account of the Exploring Voyages of H.M.S. 'Challenger," during the year 1873 and the early part of 1876. With numerous Illustrations, Coloured Maps & Charts, & Portrait of the Author, engraved by C. H. JEENS. 2 Vols. Medium 8vo. 42s. The Times says:-" It is right that the public should have some authoritative account of the general results of the expedition, ana

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PHYSICAL SCIENCE.

Wallace (A. R.)—continued.

TROPICAL NATURE: with other Essays. 8vo. 12s.

21

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22

SCIENTIFIC CATALOGUE.

SCIENCE PRIMERS FOR ELEMENTARY SCHOOLS.

Under the joint Editorship of Professors HUXLEY, ROSCOE, and BALFOUR STEWART.

Introductory. By Professor HUXLEY, F.R.S. [Nearly ready. Chemistry. By H. E. RoscOE, F.R.S., Professor of Chemistry in Owens College, Manchester. With numerous Illustrations. 18mo. IS. New Edition. With Questions.

Physics. By BALFOUR STEWART, F.R.S., Professor of Natural Philosophy in Owens College, Manchester. With numerous Illustrations. 18mo. IS. New Edition. With Questions. Physical Geography. By ARCHIBALD GEIKIE, F.R.S., Murchison Professor of Geology and Mineralogy at Edinburgh. With numerous Illustrations. New Edition with Questions.

18mo. IS.

Geology.-By Professor GEIKIE, F.R.S. With numerous Illustrations. New Edition. 18mo. cloth.

IS.

Physiology. By MICHAEL FOSTER, M.D.,

F.R.S. Wit

numerous Illustrations. New Edition. 18mo. IS.

Astronomy.-By J. NORMAN LOCKYER, F.R.S. With numerous Illustrations. New Edition. 18mo. IS.

Botany. By Sir J. D. HOOKER, K.C.S.I., C.B., F.R.S. With numerous Illustrations. New Edition. 18mo. IS.

Logic. By Professor STANLEY JEVONS, F.R.S. New Edition.

18mo. IS.

Political Economy.-By Professor STANLEY JEVONS, F.R.S. 18mo. IS.

Others in preparation.

ELEMENTARY SCIENCE CLASS-BOOKS.

Astronomy.-By the ASTRONOMER ROYAL. POPULAR ASTRONOMY. With Illustrations. By Sir G. B. AIRY, K.C.B., Astronomer Royal. New Edition. 18mo. 4s. 6d.

Astronomy.-ELEMENTARY LESSONS IN ASTRONOMY. With Coloured Diagram of the Spectra of the Sun, Stars, and Nebulæ, and numerous Illustrations. By J. NORMAN LOCKYER, F.R.S. New Edition. Fcap. 8vo. 5s. 6d.