20. _EVOLUTION_ By Professor J. ARTHUR THOMSON and Professor PATRICK GEDDES. "A many-coloured and romantic panorama, opening up, like no other book we know, a rational vision of world-development."--_Belfast News-Letter._ 22. _CRIME AND INSANITY_ By Dr C. A. MERCIER. "Furnishes much valuable information from one occupying the highest position among medico-legal psychologists."--_Asylum News._ 28. _PSYCHICAL RESEARCH_ By Sir W. F. BARRETT, F.R.S., Professor of Physics, Royal College of Science, Dublin, 1873-1910. "What he has to say on thought-reading, hypnotism, telepathy, crystal-vision, spiritualism, divinings, and so on, will be read with avidity."--_Dundee Courier._ 31. _ASTRONOMY_ By A. R. HINKS, M.A., Chief Assistant, Cambridge Observatory. "Original in thought, eclectic in substance, and critical in treatment.... No better little book is available."--_School World._ 32. _INTRODUCTION TO SCIENCE_ By J. ARTHUR THOMSON, M.A., Regius Professor of Natural History, Aberdeen University. "Professor Thomson's delightful literary style is well known; and here he discourses freshly and easily on the methods of science and its relations with philosophy, art, religion, and practical life."--_Aberdeen Journal._ 36. _CLIMATE AND WEATHER_ By Prof. H. N. DICKSON, D.Sc.Oxon., M.A., F.R.S.E., President of the Royal Meteorological Society. (With Diagrams.) "The author has succeeded in presenting in a very lucid and agreeable manner the causes of the movements of the atmosphere and of the more stable winds."--_Manchester Guardian._ 41. _ANTHROPOLOGY_ By R. R. MARETT, M.A., Reader in Social Anthropology in Oxford University. "An absolutely perfect handbook, so clear that a child could understand it, so fascinating and human that it beats fiction 'to a frazzle.'"--_Morning Leader._ 44. _THE PRINCIPLES OF PHYSIOLOGY_ By Prof. J. G. MCKENDRICK, M.D. "Upon every page of it is stamped the impress of a creative imagination."--_Glasgow Herald._ 46. _MATTER AND ENERGY_ By F. SODDY, M.A., F.R.S. "Prof. Soddy has successfully accomplished the very difficult task of making physics of absorbing interest on popular lines."--_Nature._ 49. _PSYCHOLOGY, THE STUDY OF BEHAVIOUR_ By Prof. W. MCDOUGALL, F.R.S., M.B. "A happy example of the non-technical handling of an unwieldy science, suggesting rather than dogmatising. It should whet appetites for deeper study."--_Christian World._ 53. _THE MAKING OF THE EARTH_ By Prof. J. W. GREGORY, F.R.S. (With 38 Maps and Figures.) "A fascinating little volume.... Among the many good things contained in the series this takes a high place."--_The Athenæum._ 57. _THE HUMAN BODY_ By A. KEITH, M.D., LL.D., Conservator of Museum and Hunterian Professor, Royal College of Surgeons. (Illustrated.) "It literally makes the 'dry bones' to live. It will certainly take a high place among the classics of popular science."--_Manchester Guardian._ 58. _ELECTRICITY_