HANDBOOK OF CHEMICAL ANALYSIS, adapted to the Unitary System of Notation. Based on the 4th Edition of Dr. H. Wills’ Anleitung zur chemischen Analyse. By F. T. Conington, M.A., F.C.S. Post 8vo price 7s 6d

CONINGTON’S TABLES OF QUALITATIVE ANALYSIS, to accompany in use his Handbook of Chemical Analysis. Post 8vo 2s 6d

A HANDBOOK OF VOLUMETRICAL ANALYSIS. By Robert H. Scott, M.A., T.C.D., Secretary of the Geological Society of Dublin. Post 8vo 4s 6d

A TREATISE ON ELECTRICITY, in Theory and Practice. By A. De la Rive, Professor in the Academy of Geneva. Translated for the Author by C. V. Walker, F.R.S. With Illustrations. 3 vols. 8vo price £3 13s

AN ESSAY ON CLASSIFICATION [The Mutual Relation of Organised Beings]. By Louis Agassiz. 8vo 12s

A DICTIONARY OF SCIENCE, LITERATURE, AND ART: Comprising the History, Description, and Scientific Principles of every Branch of Human Knowledge. Edited by W. T. Brande, F.R.S.L. and E. The Fourth Edition, revised and corrected. 8vo

[In the press.

THE CORRELATION OF PHYSICAL FORCES. By W. R. Grove, Q.C., M.A., V.P.R.S., Corresponding Member of the Academies of Rome, Turin, &c. Fourth Edition. 8vo 7s 6d

THE ELEMENTS OF PHYSICS. By C. F. Peschel, Principal of the Royal Military College, Dresden. Translated from the German, with Notes, by E. West. 3 vols. fcp 8vo 21s

PHILLIPS’S ELEMENTARY INTRODUCTION TO MINERALOGY. A New Edition, with extensive Alterations and Additions by H. J. Brooke, F.R.S., F.G.S.; and W. H. Miller, M.A., F.G.S. With numerous Woodcuts. Post 8vo 18s