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AGRICULTURE-ELEMENTARY LESSONS IN AGRI-
CULTURAL SCIENCE. By H. TANNER, F.C.S., Professor
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ECONOMICS-THE ECONOMICS OF INDUSTRY. By A.
MARSHALL, M.A., late Principal of University College,
Cheltenham, and MARY P. MARSHALL, late Lecturer at
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COSSA-GUIDE TO THE STUDY OF POLITICAL
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DYER AND VINES-THE STRUCTURE OF PLANTS. By
Professor THISELTON DYER, F.R.S., assisted by SYDNEY
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Cambridge. With numerous Illustrations. [In preparation.
FAWCETT-A MANUAL OF POLITICAL ECONOMY.
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FLEISCHER-A SYSTEM OF VOLUMETRIC ANALY
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FLOWER (W. H.)—AN INTRODUCTION TO THE OSTEOLOGY OF THE MAMMALIA. Being the substance of the Course of Lectures delivered at the Royal College of Surgeons of England in 1870. By Professor W. H. FLOWER, F.R.S., F.R.C.S. With numerous Illustrations. New Edition, enlarged. Crown 8vo. 10s. Ed.

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HOOKER-THE STUDENT'S FLORA OF THe british ISLANDS. By Sir J. D. HOOKER, K.C.S.I., C.B., F.R.S., M.D., D.C.L. New Edition, revised. Globe 8vo. 10s. 6d,

HUXLEY-PHYSIOGRAPHY. An Introduction to the Study of Nature. By Professor HUXLEY, F.R.S. With numerous Illus. trations, and Coloured Plates. Third and Cheaper Edition. Crown 8vo.

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D.Sc. HUXLEY

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STUDIES IN DEDUCTIVE LOGIC. By Professor W. STANLEY JEVONS, LL.D., M.A., F.R.S. Crown 8vo. 6s. KIEPERT-A MANUAL OF ANCIENT GEOGRAPHY. From the German of Dr. H. KIEPERT. Crown 8vo.

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By A. B. W. KENNEDY, M. Inst. C.E., Professor of Engineering and Mechanical Technology in University College, London. With Illustrations. [In the press. OLIVER (Professor)—FIRST BOOK OF INDIAN BOTANY By Professor DANIEL OLIVER, F.R.S., F.L.S., Keeper of the Herbarium and Library of the Royal Gardens, Kew. With numerous Illustrations. Extra fcap. 8vo. 65. bal.

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PARKER and BETTANY — THE

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TAIT—AN ELEMENTARY TREATISE ON HEAT. By
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TYLOR-ANTHROPOLOGY. An Introduction to the Study of
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BALFOUR-A TREATISE ON COMPARATIVE EMBRY
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BALL (R. S., A.M.)—EXPERIMENTAL MECHANICS. A
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CLAUSIUS-MECHANICAL THEORY OF HEAT. By R.
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COTTERILL-A TREATISE ON APPLIED MECHAN
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DANIELL-A TREATISE ON PHYSICS FOR MEDICAL
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8vo. FOSTER-A TEXT-BOOK OF PHYSIOLOGY. BY MICHAEL FOSTER, M.D., F.R.S. With Illustrations. Third Edition, revised. 8vo. 215.

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GAMGEE—A 1EXT-BOOK OF THE PHYSIOLOGICAL CHEMISTRY OF THE ANIMAL BODY. Including an account of the chemical changes occurring in Disease. By A. GAMGEE, M.D., F.R.S., Professor of Physiology in the Victoria University and Owens College, Manchester. 2 Vols. 8vo. With Illustrations. Vol. I. 18s.

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GEGENBAUR-ELEMENTS OF COMPARATIVE ANATOMY. By Professor CARL GEGENBAUR. A Translation by F. JEFFREY BELL, B. A. Revised with Preface by Professor E. RAY LANKESTER, F.R.S. With numerous Illustrations. 8vo.

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GEIKIE-TEXT-BOOK OF GEOLOGY. By ARCHIBALD GEIKIE, F.R.S., Professor of Geology in the University of Edinburgh. With numerous Illustrations. 8vo. [In the press. GRAY-STRUCTURAL BOTANY, OR ORGANOGRAPHY ON THE BASIS OF MORPHOLOGY. To which are added the principles of Taxonomy and Phytography, and a Glossary of Botanical Terms. By Professor ASA GRAY, LL.D. 8vo. 10s. 6d.

NEWCOMB-POPULAR ASTRONOMY. By S. NEWCOMB, LL.D., Professor U.S. Naval Observatory. With 112 Illus

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REULEAUX - THE KINEMATICS OF MACHINERY. Outlines of a Theory of Machines. By Professor F. REULEAUX. Translated and Edited by Professor A. B. W. KENNEDY, C.E. With 450 Illustrations. Medium 8vo. 21s.

ROSCOE and SCHORLEMMER INORGANIC CHEMISTRY. A Complete Treatise on Inorganic Chemistry. By Professor H. E. ROSCOE, F.R.S., and Professor C. SCHORLEMMER, F.R.S. With numerous Illustrations. Medium 8vo. Vol. I.-The Non-Metallic Elements. 215. Vol. II. Part I.Metals. 18s. Vol. II. Part II.-Metals. 18.

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ORGANIC CHEMISTRY. A complete Treatise on Organic Chemistry. By Professors ROSCOE and SCHORLEMMER. With numerous Illustrations. Medium 8vo. [In the press. SCHORLEMMER-A MANUAL OF THE CHEMISTRY OF THE CARBON COMPOUNDS, OR ORGANIC CHEMISTRY. By C. SCHORLEMMER, F.R.S., Professor of Chemistry, the Victoria University, the Owens College, Manchester. With Illustrations. 8vo. 145.

THORPE AND RÜCKER-A TREATISE ON CHEMICAL PHYSICS. By Professor THORPE, F.R.S., and Professor RÜCKER, of the Yorkshire College of Science. Illustrated. 8vo. [In preparation.

NATURE SERIES.

THE SPECTROSCOPE AND ITS APPLICATIONS. By J. NORMAN LOCKYER, F.R.S. With Coloured Plate and numerous Illustrations. Second Edition. Crown 8vo. 35. 6d. THE ORIGIN AND METAMORPHOSES OF INSECTS. By Sir JOHN LUBBOCK, M.P., F.R.S., D.C.L. With nume rous Illustrations. Second Edition. Crown 8vo. 3s. 6d. THE TRANSIT OF VENUS. By G. FORBES, M.A., Professor of Natural Philosophy in the Andersonian University, Glasgow. Illustrated. Crown 8vo. 35. 6d.

THE COMMON FROG. By ST. GEORGE MIVART, F.R.S., Lecturer in Comparative Anatomy at St. Mary's Hospital. With numerous Illustrations. Crown 8vo. 35. 6d.

POLARISATION OF LIGHT. By W. SPOTTISWOODE, P.R.S. With many Illustrations. Second Edition. Crown 8vo.

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ON BRITISH WILD FLOWERS CONSIDERED IN RELATION TO INSECTS. By Sir JOHN LUBBOCK, M.P., F.R.S. With numerous Illustrations. Second Edition. Crown 8vo. 4s. 6d.