23. Astronomy. By A.R. HINKS, Chief Assistant at the Cambridge Observatory. "Decidedly original in substance, and the most readable and informative little book on modern astronomy we have seen for a long time."--_Nature_. 24. Psychical Research. By PROF. W.F. BARRETT, formerly President of the Society for Psychical Research. A strictly scientific examination. 9. The Evolution of Plants. By DR. D.H. SCOTT, President of the Linnean Society of London. The story of the development of flowering plants, from the earliest zoological times, unlocked from technical language. 43. Matter and Energy. By F. SODDY, Lecturer in Physical Chemistry and Radioactivity, University of Glasgow. "Brilliant. Can hardly be surpassed. Sure to attract attention."--_New York Sun_. 41. Psychology, The Study of Behaviour. By WILLIAM MCDOUGALL, of Oxford. A well digested summary of the essentials of the science put in excellent literary form by a leading authority. 42. The Principles of Physiology. By PROF. J.G. MCKENDRICK. A compact statement by the Emeritus Professor at Glasgow, for uninstructed readers. 37. Anthropology. By R.R. MARETT, Reader in Social Anthropology, Oxford. Seeks to plot out and sum up the general series of changes, bodily and mental, undergone by man in the course of history. "Excellent. So enthusiastic, so clear and witty, and so well adapted to the general reader."--_American Library Association Booklist_. 17. Crime and Insanity. By DR. C.A. MERCIER, author of _Text-Book of Insanity_, etc. 12. The Animal World. By PROF. F.W. GAMBLE. 15. Introduction to Mathematics. By A.N. WHITEHEAD, author of _Universal Algebra_. PHILOSOPHY AND RELIGION 69. A History of Freedom of Thought. By JOHN B. BURY, M.A., LL.D., Regius Professor of Modern History in Cambridge University. Summarizes the history of the long struggle between authority and reason and of the emergence of the principle that coercion of opinion is a mistake. 55. Missions: Their Rise and Development. By MRS. MANDELL CREIGHTON, author of _History of England_. The author seeks to prove that missions have done more to civilize the world than any other human agency. 52. Ethics. By G.E. MOORE, Lecturer in Moral Science, Cambridge. Discusses what is right and what is wrong, and the whys and wherefores. 65. The Literature of the Old Testament. By GEORGE F. MOORE, Professor of the History of Religion, Harvard University. "A popular work of the highest order. Will be profitable to anybody who cares enough about Bible study to read a serious book on the subject."--_American Journal of Theology_ 50. The Making of the New Testament. By B.W. BACON, Professor of New Testament Criticism, Yale. An authoritative summary of the results of modern critical research with regard to the origins of the New Testament. 96. A History of Philosophy. By CLEMENT C.J. WEBB, Oxford. 35. The Problems of Philosophy. By BERTRAND RUSSELL, Lecturer and Late Fellow, Trinity College, Cambridge.