The Correlation of Physical Forces.

By the Hon. Sir W. R. Grove, F.R.S. etc.

with Edition, with other Contributions to

Professor Helmholtz

Popular Lectures on Scientific Subjects. Translated by E. Atkinson, F.C.S.

With many Illustrative Wood Engravings.

NEW WORKS published by LONGMANS & CO. 19

Ganot's Natural Philosophy for General Readers and Young Persons; a Course of Physics divested of Mathematical Formulae and expressed in the language of daily life. Translatedby E. Atkinson, FCS.

Cr. 8vo. with 404 Woodcuts, 7s. 6d.

Ganot's Elementary

Treatise on Physics, Experimental and Applied, for the use of Colleges and

Schools.

Translated and edited by E. Atkinson, F.C.S.

New Edition, with a Coloured Plate and 726 Woodcuts. Post 8vo. 15s.

Principles of Animal

Mechanics.

By the Rev. S. Haughton, EPS.

Second Edition. 8vo. 21 s.

Weinholds Introduction to Experimental Physics, Theoretical and Practical; including Directions for Constructing Physical Apparatus and for Making Experiments.

Translated by B. Loewy, F.R.A.S. With a Preface by G. C. Foster, F.R.S.

With numerous Woodcuts. 8vo.

Text-Books of Science

Mechanical and Physical adapted for the use of Art sans and of Students is Public and other School {The first Ten edited b T. M. Goodeve, M.A. Le turer on Applied Science a the Royal School of Mines the remainder edited by C. W. Merrifield, F.R.S an Examiner in the De partment of Public Educa, tion.)

Small 8vo. Woodcuts.

Edited by T. M. Goodeve, M. A.

Anderson's Strength of Materials, 3s. 6d. Bloxam's Metals, 3s. 6d. Goodeve's Mechanics, 3s. 6d.

---------- Mechanism, 3s. 6d.

Griffin's Algebra & Trigonometry, 3s. 6d

Notes on the same, with Solutions, 3s. 6d Jenkin's Electricity 6° Magnetism, 3s. 6d. Maxwell's Theory of Heat, 3s. 6d. Merrifield's Technical Arithmetic, 3s. 6d

Key, 3s. 6d. Miller's Inorganic Chemistry, 3s. 6d. Shelley's Workshop Appliances, 3s. 6d. Watson's Plane 6° Solid Geometry, 3s. 6d.

Edited by C. W. Merrifield, F.R.S.

Armstrong's Organic Chemistry, 3s. 6d. Thorpe's Quantitative Analysis, 4s. 6d. Thorpe and Muir's Qualitative Analys. 3s. 6d.

Address delivered be/of the British Associatio assembled at Belfast; wit Additions and a Preface. By John Tyndall, F.R.S President.

8vo. price 3s.

Fragments of Science.

By John Tyndall, F.R.,

20 NEW WORKS published by LONGMANS & CO.

I eat a Mode of Motion. By John Tyndall, F.R.S.

urth Edition. Cr. 8vo. with Woodcuts, 10s. 6d. • found; a Course of Eight

Lectures delivered at the Royal Institution of Great Britain. By John Tyndall, F.R.S.

Portrait and Woodcuts. Cr. 8vo. 9s.

Researches on Diamagnetism and Magne-Crystal-lic Action; including the Question of Diamagnetic Polarity. By John Tyndall, F.R.S.

With 6 Plates and many Woodcuts. 8vo. 14s.

Contributions to Molecular Physics in the domain of Radiant Heat. By John Tyndall, F.R.S.

With 2 Plates and 31 Woodcuts. 8vo. 16s.

lectures on Light, delivered in the United States of America in 1872 and

1873-

By J. Tyndall, F.R.S.

Crown 8vo. 7s. 6d.

Votes of a Course of

Seven Lectures on Electrical Phenomena and Theories, delivered at the Royal Institution. By J. Tyndall, F.R.S.

Notes of a Course of Nine

Lectures on Light, delivered at the Royal Institution. By J. Tyndall, F.R.S.

Crown 8vo. 1s. sewed, or 1s. 6d. cloth.

A Treatise on Magnetism, General and Terrestrial.

By Humphrey Lloyd, D.D. D.C.L. Provost of Trinity College, Dublin.

8vo. price 10s. 6d.

Elementary Treatise on the Wave-Theory of Light. By H. Lloyd, D.D. D.C.L.

Third Edition. 8vo. I0s. 6d.

Professor Owen's Leetures on the Comparative Anatomy and Physiology of Invertebrate Animals.

2nd Edition, with 235 Woodcuts. 8vo. 2ls.

The Comparative Anatomy and Physiology of the

Vertebrate Animals.

By Richard Owen, F.R.S.

With 1,472 Woodcuts. 3 vols. 8vo. 3.13s. 6d.

Light Science for Leisure Hours; a Series of Familiar Essays on Scientific Subjects, Natural Phe-nomena, etc. By R. A. Proctor, B.A.

First and Second Series. 2 vols, crown 8vo.

NEW WORKS PUBLISHED BY LONGMANS & CO. 21

Kirby and Spences Introduction to Entomology, or Elements of the Natural History of Insects.

Crown 8vo. 5s.

Strange Dwellings ; a Description of the Habitations of Animals, abridged from ' Homes without Hands! By Rev. J. G. Wood, M.A.

With Frontispiece and 60 Woodcuts. Crown 8vo. 7s. 6d.

Homes without Hands ; a Description of the Habitations of Animals, classed according to their Principle of Construction.

By Rev. J. G. Wood, M.A.

With about 140 Vignettes on Wood. 8vo. 2ls.

Out of Doors ; a Selection of Original Articles on Practical Natural History.

By Rev. J. G. Wood, M.A.

With 6 Illustrations from Original Designs engraved on Wood. Crown 8vo. 7s. 6d.

The Polar World: a

Popular Description of Man and Nature in the Arctic and Antarctic Regions of the Globe.

By Dr. G. Hartwig.

With Chromoxylographs, Maps, and Wood-

The Sea and its Living

Wonders.

By Dr. G. Hartwig.

Fourth Edition, enlarged. 8vo. with many, Illustrations, 10s. 6d.

The Tropical World; a Popular Scientific Account' of the Natural History of the Equatorial Regions. By Dr. G. Hartwig.

With about 200 Illustrations. 8vo. 10s. 6d. '

The Subterranean World.

By Dr. G. Hartwig.

With Maps and many Woodcuts. 8vo. 21 s.

The Aerial World.

By Dr. George Hartwig.

With 8 Chromoxylographs and about 60 other Illustrations engraved on Wood. 8vo. price 21s.

Insects at Home; a Popular Account of British Insects, their Structure, Habits, and Transformations. By Rev. J. G. Wood, M.A.

With upwards of 700 Woodcuts. 8vo. 21s.

Insects Abroad; being a

PopularAccount of Foreign Insects, their Structure, Habits, and Transformations. By Rev. J. G. Wood, M.A.

With upwards of 700 Woodcuts. 8vo. 21s.

A Familiar History of

Birds.

By E. Stanley, D.D. late Ld. Bishop of Norwich.

feb 8vo with Woodcuts. 3s. 6d.

22 NEW WORKS PUBLISHED BY LONGMANS & CO.

Rocks Classified and Described. By B. Von Cotta.

English Edition, by P. H. LAWRENCE {with English, Germany and French Syno-nymes), revised by the Author. Post 8vo. 14s.

Primaeval World of Switzerland.

By Professor Oswald Heer, of the University of Zurich. Translated by W. S. Dallas, F.L.S. and edited by J antes Hey wood, M.A. F.R.S.

2 vols. 8vo. with numerous Illustrations.

[In the press.

The Origin of Civilisation, and the Primitive Condition of Man; Mental and Social Condition of Savages.

By Sir J. Lubbock, Bart. M.P. F.R.S.

Third Edition, with 25 Woodcuts. 8vo. 16s.

A Manual of Anthropology, or Science of. Man, based on Modern Research. By Charles Bray.

Crown 8vo. 5s.

A Phrenologist amongst the Todas, or the Study of a Primitive Tribe in South India; History, Charactery Customs, Religion, Infanticide, Polyandry, Language. By W. E. Marshall, Lieut.-Col. Bengal Staff Corps,

The Ancient Stone Implements, Weapons, and Ornaments of Great Britain.

By John Evans, F.R.S.]

With 2 Plates and 476 Woodcuts. 8vo. 28s.

The Elements of Botany for Families and Schools. Tenth Edition, revised by Thomas Moore, F.L.S,

Fcp. 8vo. with 154 Woodcuts 2s. 6d.

Bible Animals; a Description of every Living Creature mentioned in the Scriptures, from the Ape to the Coral. By Rev. J. G. Wood, M.A.

With about 100 Vignettes on Wood. 8vo. 21s.

The Rose Amateur s

Guide.

By Thomas Rivers.

Tenth Edition. Fcp. 8vo. 4s.

A Dictionary of Science,

Literature, and Art.

Fourth Edition, re-edited by the late W. T. Brande (the Author) and Rev. G W. Cox, M.A.

3 vols, medium 8vo. 63s.

Loudon's Encyclopaedia of Plants ; comprising the Specific Character, Description, Culture, History, etc. of all the Plants found in Great Britain.

NEW WORKS PUBLISHED BY LONGMANS & CO. 23

The Treasury of Botany, or Popular Dictionary of the Vegetable Kingdom ; with which is incorporated a Glossary of Botanical

Terms.

Edited by J. Lindley,

F.R.S. and T. Moore,

F.L.S.

With 274 Woodcuts and 20 Steel Plates. Two Parts, fcp. 8vo. 12s.

Handbook of Hardy

Trees, Shrubs, and Herbaceous Plants; containing Descriptions etc. of the Best Species in Cultivation; with Cultural Details, Comparative Hardiness, suitability for particular positions, etc. Based on the French Work of De-caisne and Naudin, and including the 720 Original Woodcut Illustrations. By W. B. Hemsley.

Medium 8vo. 21s.

A General System of

Descriptive and Analytical Botany.

Translated from the French of Le Maout and De-caisne, by Mrs. Hooker Edited and arranges according to the English Botanical System, by J. D. Hooker, M.D. etc. Director of the Royal Botanic Gardens, Kew.

With 5,500 Woodcuts. Imperial 8vo. 52s. 6d.

Forest Trees and Wood land Scenery, as described in Ancient and Modern Poets.

By William Menzies, Deputy Surveyor of Windsor Forest and Parks, etc.

In One Volume, imperial 4/0. with Twenty Plates, Coloured in facsimile of the original drawings, price 5. 5s.

[Preparing for publication.