Soap-Bubbles, and the Forces which Mould Them. A course of Lectures by C. V. BOYS, A.R.S.M., F.R.S. With numerous diagrams. 2_s._ 6_d._ Spinning Tops. By Professor J. PERRY, M.E., D.Sc., F.R.S. With numerous diagrams. 2_s._ 6_d._ Diseases of Plants. By Professor MARSHALL WARD. With Numerous Illustrations. 2_s._ 6_d._ The Story of a Tinder-Box. A course of Lectures by CHARLES MEYMOTT TIDY, M.B., M.S., F.C.S. With Numerous Illustrations. 2_s._ Time and Tide. A Romance of the Moon. By Sir ROBERT S. BALL, LL.D., Royal Astronomer of Ireland. With Illustrations. 2_s._ 6_d._ MANUALS OF HEALTH. _Fcap. 8vo, 128 pp., limp cloth, price 1s. each._ Health and Occupation. By B. W. RICHARDSON, Esq., F.R.S., M.D. Habitation in Relation to Health (The). By F. S. B. CHAUMONT, M.D., F.R.S. On Personal Care of Health. By the late E. A. PARKES, M.D., F.R.S. Water, Air, and Disinfectants. By W. NOEL HARTLEY, Esq., King's College. MANUALS OF ELEMENTARY SCIENCE. _Fcap. 8vo, 128pp., with Illustrations, limp cloth, 1s. each._ Physiology. By F. LE GROS CLARKE, F.R.S., St. Thomas's Hospital. Geology. By the Rev. T. G. BONNEY, M.A., F.G.S., Fellow and late Tutor of St. John's College, Cambridge. Chemistry. By ALBERT J. BERNAYS. Astronomy. By W. H. M. CHRISTIE, M.A., the Royal Observatory, Greenwich. Botany. By ROBERT BENTLEY, Professor of Botany in King's College, London. Zoology. By ALFRED NEWTON, M.A., F.R.S., Professor of Zoology and Comparative Anatomy in the University of Cambridge. Matter and Motion. By the late J. CLERK MAXWELL, M.A., Trinity College, Cambridge. Spectroscope and its Work (The). By the late RICHARD A. PROCTOR. Crystallography. By HENRY PALIN GURNEY, M.A., Clare College, Cambridge. Electricity. By the late Professor FLEEMING JENKIN. NATURAL HISTORY RAMBLES. _Fcap. 8vo, with numerous Woodcuts, Cloth boards, 2s. 6d. each._ IN SEARCH OF MINERALS. By the late D. T. ANSTED, M.A., F.R.S. LAKES AND RIVERS. By C. O. GROOM NAPIER, F.G.S. LANE AND FIELD. By the late Rev. J. G. WOOD, M.A. MOUNTAIN AND MOOR. By J. E. TAYLOR, F.L.S., F.G.S., Editor of "Science-Gossip." PONDS AND DITCHES. By M. C. COOKE, M.A., LL.D. THE SEA-SHORE. By Professor P. MARTIN DUNCAN, M.B. (London), F.R.S. THE WOODLANDS. By M. C. COOKE, M.A., LL.D. UNDERGROUND. By J. E. TAYLOR, F.L.S. SERIES OF PHOTO-RELIEVO MAPS. _(Patented) Size 19 in. by 14 in._ ENGLAND AND WALES.--SCOTLAND.--EUROPE. Names of places and rivers left to be filled in by _s._ _d._ scholars _each_ 0 6 With rivers and names of places " 0 9 With names of places, and county and country divisions in colours " 1 0 ASIA. Names of places and rivers left to be filled in by scholars " 0 6 With rivers and names of places " 0 9 SOUTH LONDON.