Chapter IV.--Chemistry of Soils. Chapter V.--Biology of

Soils. Chapter VI.--Fertility. Chapter VII.--Principles of Manuring. Chapter VIII.--Phosphatic Manures. Chapter IX.--Phospho-Nitrogenous Manures. Chapter X.--Nitrogenous Manures. Chapter XI.--Potash Manures. Chapter XII.--Compound and Miscellaneous Manures. Chapter XIII.--General Manures. Chapter XIV.--Farmyard Manure. Appendices.--I. Valuation of Manures; II. Composition and Manurial Value of Various Farm Foods. Index.

BOTANY

PLANT PHYSIOLOGY AND ECOLOGY. By FREDERIC EDWARD CLEMENTS, Ph.D., Professor of Botany in the University of Minnesota. With 125 Illustrations. Demy 8vo. 10_s._ 6_d._ net.

TIMBER. By J. R. BATERDEN, Assoc.M.Inst.C.E. Profusely Illustrated from Photographs and Diagrams. Extra Crown 8vo. 6_s._ net.

This is essentially a practical work, and botany is only incidentally touched upon. The timbers dealt with are those in most general use, either in their native districts or in the timber trade, together with some others which are likely before long to come into the market.

CYTOLOGY

THE ESSENTIALS OF CYTOLOGY: AN INTRODUCTION TO THE STUDY OF LIVING MATTER. By CHARLES EDWARD WALKER, Assistant Director of the Cancer Research, Liverpool, and Honorary Lecturer in Cytology to the School of Tropical Medicine in the University of Liverpool; formerly Demonstrator of Zoology in the Royal College of Science, London. Illustrated. Demy 8vo. 7_s._ 6_d._ net.

POLITICAL ECONOMY

THE ELEMENTS OF POLITICAL SCIENCE. By STEPHEN LEACOCK, formerly Lecturer on Political Science at McGill University, Montreal. Crown 8vo. 7_s._ 6_d._ net.

CONTENTS:--Part I.--THE NATURE OF THE STATE: I. Political Science, the Theory of the State. II. The Origin of the State; Fallacious Theories. III. The True Origin of the State. IV. The Sovereignty of the State. V. The Liberty of the Individual. VI. Relation of States to One Another. VII. The Form of the State.