Griffin's Algebra & Trigonometry, 3s. 6d. Notes on the same, with Solutions, 3s. 6d. Jenkin's Electricity & 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.

Theoretical and Practical; including Directions for Constructing Physical Ap

Watson's Plane & Solid Geometry, 3s. 6d.

Edited by C. W. Merrifield, F.R.S. Armstrong's Organic Chemistry, 3s. 6d.

Experiments.
Translated by B. Loewy,
F.R.A.S. With a Pre-
face by G. C. Foster,
F.R.S.

With 3 Coloured Plates and 404 Woodcuts. 8vo. price 31s. 6d.

Principles of Animal

Mechanics.

By the Rev. S. Haughton, F.R.S.

Second Edition. 8vo. 21s.

Thorpe and Muir's Qualitative Analysis, 3s. 6d.

Fragments of Science. By John Tyndall, F.R.S.

New Edition, in the press.

Address delivered before

the British Association
assembled at Belfast.

By John Tyndall, F.R.S.
President.

8th Thousand, with New Preface and the Manchester Aduress. 8vo. price 4s. 6d.

Heat a Mode of Motion. By John Tyndall, F.R.S. Fifth Edition, Plate and Woodcuts. Crown 8vo. 10s. 6d.

Sound.

A Treatise on Magnetism, General and Terrestrial.

By H. Lloyd, D.D. D.C.L. 8vo. price 10s. 6d.

Third Edition, including Recent Researches

on Fog-Signalling; Portrait and Woodcuts. Crown 8vo. 10s. 6d.

Researches on Diamagnetism and Magne-Crystallic Action; including 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.

the Wave-Theory of Light. By H. Lloyd, D.D. D.Č.L.

Third Edition. 8vo. IOs. 6d.

An Elementary Exposition of the Doctrine of Energy.

By D. D. Heath, M.A.

Post 8vo. 4s. 6d.

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.

delivered in America in 1872 and 1873.

By John Tyndall, F.R.S.

Second Edition, with Portrait, Plate, and 59 Diagrams. Crown 8vo. 7s. 6d.

Notes of a Course of Nine Lectures on Light, delivered at the Royal Institution. By John Tyndall, F.R.S. Crown 8vo. Is. sewed, or Is. 6d. cloth.

Notes of a Course of Seven Lectures on Electri

cal Phenomena and Theories, delivered at the Royal Institution.

By John Tyndall, F.R.S.

Crown 8vo. Is. sewed, or Is. 6d. cloth.

mentary Papers on Science and other subjects. Edited by the Rev. J. Hol land.

By Dr. G. Hartwig.

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. 14s.

Out of Doors; a Selec· tion 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 Woodcuts. 8vo. 10s. 6d.

The Sea and its Living Wonders.

By Dr. G. Hartwig.
Fourth Edition, enlarged. 8vo. with many
Illustrations, 10s. 6d.

The Tropical World.
By Dr. G. Hartwig.

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

With Maps and Woodcuts. 8vo. 10s. 6d.

The Aerial World; a
Popular Account of the
Phenomena and Life of
the Atmosphere.
By Dr. George Hartwig.

With Map, 8 Chromoxylographs, and 60
Woodcuts. 8vo. price 21s.

A Familiar History of
Birds.

By E. Stanley, D.D. late
Ld. Bishop of Norwich.
Fcp. 8vo. with Woodcuts, 3s. 6d.

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

Popular Account of Foreign Insects, their Structure, Habits, and Transformations. By Rev. J. G. Wood, M.A. With upwards of 700 Woodcuts. 8vo. 215.

Rocks Classified and Described.

By B. Von Cotta.

English Edition, by P. H. LAWRENCE (with English, German, and French Synonymes), revised by the Author. Post 8vo. 14s.

Heer's Primæval World of Switzerland.

Translated by W. S. Dal-
las, F.L.S. and edited by
James Heywood, 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 F. Lubbock, Bart.
M.P. F.R.S.

Third Edition, with 25 Woodcuts. 8vo. 18s

The Native Races of the Pacific States of North America.

By Hubert Howe Bancroft.

Vol. I. Wild Tribes, their Manners and Customs; with 6 Maps. 8vo. 25s.

Vol. II. Native Races of the Pacific States. 25s.

**To be completed early in the year 1876,

in Three more Volumes

Vol. III. Mythology and Languages of both Savage and Civilized Nations.

Vol. IV. Antiquities and Architectural Remains.

Vol. V. Aboriginal History and Migrations; Index to the Entire Work.

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. Eleventh 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. 7. G. Wood, M.A.

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

Guide.

Amateur's

By Thomas Rivers.
Tenth Edition. Fcp. 8vo. 4s.

A Dictionary of Science,
Literature, and Art.
Re-edited by the late W. T.
Brande(the Author)and
Rev. G. W. Cox, M.A.
New Edition, revised. 3 vols.medium
8vo. 63s.

On the Sensations of
Tone, as a Physiological
Basis for the Theory of
Music.

By H. Helmholtz, Professor of Physiology in the University of Berlin. Translated by A. J. Ellis, F.R.S.

8vo. 36s.