Part I

., containing the Analysis of the Intellectual Powers. Post 8vo 7_s_ 6_d_

=OUTLINE OF THE NECESSARY LAWS OF THOUGHT=: A Treatise on Pure and Applied Logic. By the Most Rev. WILLIAM THOMSON, D.D., Lord Archbishop of York. _Fifth Edition._ Post 8vo 5_s_ 6_d_

=THE CYCLOPÆDIA OF ANATOMY AND PHYSIOLOGY.= Edited by ROBERT B. TODD, M.D., F.R.S. Assisted in the various departments by nearly all the most eminent Cultivators of Physiological Science of the present age. 5 vols. 8vo with 2,853 Woodcuts, price £6 6_s_

=A DICTIONARY OF PRACTICAL MEDICINE=: Comprising General Pathology, the Nature and Treatment of Diseases, Morbid Structures, and the Disorders especially incidental to Climates, to Sex, and to the different Epochs of Life. By JAMES COPLAND, M.D., F.R.S. 3 vols. 8vo price £5 11_s_

=HEAT CONSIDERED AS A MODE OF MOTION=: A Course of Lectures delivered at the Royal Institution of Great Britain. By JOHN TYNDALL, F.R.S., Professor of Natural Philosophy in the Royal Institution. Crown 8vo with Illustrations.

[_Just ready._

=THE COMPARATIVE ANATOMY AND PHYSIOLOGY OF THE VERTEBRATE ANIMALS.= By RICHARD OWEN, F.R.S., D.C.L., Superintendent of the Natural History Department, British Museum, &c. With upwards of 1,200 Wood Engravings. 8vo

[_Nearly ready._

=VAN DER HOEVEN’S HANDBOOK OF ZOOLOGY.= Translated from the Second Dutch Edition. By the Rev. WILLIAM CLARK, M.D., F.R.S., &c. 2 vols. 8vo. with 24 Plates of Figures, price 60_s_ cloth; or separately, VOL. I. _Invertebrata_, 30_s_; and Vol. II. _Vertebrata_, 30_s_

=THE EARTH AND ITS MECHANISM=; an Account of the various Proofs of the Rotation of the Earth; with a Description of the Instruments used in the Experimental Demonstrations; also the Theory of Foucault’s Pendulum and Gyroscope. By HENRY WORMS, F.R.A.S., F.G.S. 8vo with 31 Woodcuts, price 10_s_ 6_d_

=VOLCANOS=, the Character of their Phenomena; their Share in the Structure and Composition of the Surface of the Globe; and their Relation to its Internal Forces; including a Descriptive Catalogue of Volcanos and Volcanic Formations. By G. POULETT SCROPE, M.P., F.R.S., F.G.S. _Second Edition_, with Map and Illustrations. 8vo 15_s_

=A MANUAL OF CHEMISTRY=, Descriptive and Theoretical. By WILLIAM ODLING, M.B., F.R.S., Secretary to the Chemical Society, and Professor of Practical Chemistry in Guy’s Hospital.