1. The Foundations of Science . . . By W. C. D. Whetham, M.A., F.R.S. 2. Embryology--The Beginnings of Life . . . By Prof. Gerald Leighton, M.D. 3. Biology . . . By Prof. W. D. Henderson, M.A. 4. Zoology: The Study of Animal Life . . . By Prof. E. W. MacBride, M.A., F.R.S. 5. Botany; The Modern Study of Plants . . . By M. C. Stopes, D.Sc., Ph.D., F.L.S. 6. Bacteriology . . . By W. E. Carnegie Dickson, M.D. 7. The Structure of the Earth . . . By Prof. T. G. Bonney, F.R.S. 8. Evolution . . . By E. S. Goodrich, M.A., F.R.S. 9. Darwin . . . By Prof. W. Garstang, M.A., D.Sc. 10. Heredity . . . By J. A. S. Watson, B.Sc. 11. Inorganic Chemistry . . . By Prof. E. C. C. Baly, F.R.S. 12. Organic Chemistry . . . By Prof. J. B. Cohen, B.Sc., F.R.S. 13. The Principles of Electricity . . . By Norman K. Campbell, M.A. 14. Radiation . . . By P. Phillips, D.Sc. 15. The Science of the Stars . . . By E. W. Maunder, F.R.A.S. 16. The Science of Light . . . By P. Phillips, D.Sc. 17. Weather Science . . . By R. G. K. Lempfert, M.A. 18. Hypnotism and Self-Education . . . By A. M. Hutchison, M.D. 19. The Baby: A Mother's Book . . . By a University Woman. 20. Youth and Sex--Dangers and Safeguards for Boys and Girls . . . By Mary Scharlieb, M.D., M.S., and F. Arthur Sibly, M.A., LL.D. 21. Marriage and Motherhood . . . By H. S. Davidson, M.B., F.R.C.S.E. 22. Lord Kelvin . . . By A. Russell, M.A., D.Sc., M.I.E.E. 23. Huxley . . . By Professor G. Leighton, M.D. 24. Sir William Huggins and Spectroscopic Astronomy . . . By E. W. Maunder, F.R.A.S., of the Royal Observatory, Greenwich. 62. Practical Astronomy . . . By H. Macpherson, Jr., F.R.A.S. 63. Aviation . . . By Sydney F. Walker, R.N. 64. Navigation . . . By William Hall, R.N., B.A. 65. Pond Life . . . By E. C. Ash, M.R.A.C. 66. Dietetics . . . By Alex. Bryce, M.D., D.P.H. PHILOSOPHY AND RELIGION