38. THE CONCEPTS AND THEORIES OF MODERN PHYSICS. By J. B. STALLO. $1.75.
39. THE BRAIN AND ITS FUNCTIONS. By J. LUYS, Hospice Salpêtrière, Paris. With 6 Illustrations. $1.50.
40. MYTH AND SCIENCE. By TITO VIGNOLI. $1.50.
41. DISEASES OF MEMORY: An Essay in the Positive Psychology. By TH. RIBOT, author of "Heredity." $1.50.
42. ANTS, BEES. AND WASPS. A Record of Observations of the Habits of the Social Hymonoptera. By Sir JOHN LUBBOCK, Bart., F.R.S., etc. $2.00.
43. THE SCIENCE OF POLITICS. By Professor SHELDON AMOS, $1.75.
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45. MAN BEFORE METALS. By Professor N. JOLY, Science Faculty of Toulouse. With 148 Illustrations. $1.75.
46. THE ORGANS OF SPEECH AND THEIR APPLICATION IN THE FORMATION OF ARTICULATE SOUNDS. By Professor G. H. VON MEYER, University of Zürich. With 47 Illustrations. $1.75.
47. FALLACIES: A View of Logic from the Practical Side. By ALFRED SIDGWICK, B.A., Oxon. $1.75.
48. ORIGIN OF CULTIVATED PLANTS. By ALPHONSE DE CANDOLLE. $2.00.
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50. THE COMMON SENSE OF THE EXACT SCIENCES. By WILLIAM KINGDON CLIFFORD. With 100 Figures. $1.50.
51. PHYSICAL EXPRESSION: Its Modes and Principles. By FRANCIS WARNER, M.D., Assistant Physician, London Hospital. With 51 Illustrations. $1.75.
52. ANTHROPOID APES. By Professor ROBERT HARTMANN, University of Berlin. With 63 Illustrations. $1.75.
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