In his _Modern Views of Electricity_, Prof. O. J. Lodge warns us, quite rightly, that perhaps, after all, there is no such _thing_ as electricity--that electrification and electric energy may be terms to be kept for convenience; but if electricity as a term be held to imply a force, a fluid, an imponderable, or a thing which could be described by some one who knew enough, then it has no degree of probability, for spinning atomic magnets seem capable of developing all the electrical phenomena we meet. It must be thought of as a _condition_ and not as an entity. THE END _Richard Clay & Sons, Limited, London & Bungay._ PUBLICATIONS OF THE Society for Promoting Christian Knowledge. THE ROMANCE OF SCIENCE. A series of books which shows that science has for the masses as great interest as, and more edification than, the romances of the day. _Small Post 8vo, Cloth boards._ =Coal, and what we get from it.= By Professor RAPHAEL MELDOLA, F.R.S., F.I.C. With several Illustrations. 2_s._ 6_d._ =Colour Measurement and Mixture.= By CAPTAIN W. DE W. ABNEY, C.B., R.E. With numerous Illustrations. 2_s._ 6_d._ =The Making of Flowers.= By the Rev. Professor GEORGE HENSLOW, M.A., F.L.S. With several Illustrations. 2_s._ 6_d._ =The Birth and Growth of Worlds.= A Lecture by Professor A. H. GREEN, M.A., F.R.S. 1_s._ =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._ =Our Secret Friends and Foes.= By P. F. FRANKLAND, F.R.S. With numerous Illustrations. New Edition, 3_s._ =Diseases of Plants.= By Professor MARSHALL WARD, M.A., F.R.S., F.L.S. With numerous Illustrations. 2_s._ 6_d._ =The Story of a Tinder-Box.= By the late CHARLES MEYMOTT TIDY, M.B., M.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. Third Edition, revised. 2_s._ 6_d._ =The Splash of a Drop.= By Professor A. M. WORTHINGTON, F.R.S. With numerous Illustrations. 1_s._ 6_d._ NATURAL HISTORY RAMBLES. _Fcap. 8vo., with numerous Woodcuts, Cloth boards, 2s. 6d. each._ =IN SEARCH OF MINERALS.= By the late D. T. ANSTEAD, 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., Author of "Man and his Handiwork," &c. =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., Author of "Freaks and Marvels of Plant Life," &c. =UNDERGROUND.= By J. E. TAYLOR, F.L.S., F.G.S. =HEROES OF SCIENCE.= _Crown 8vo. Cloth boards, 4s. each._ =ASTRONOMERS.= By E. J. C. MORTON, B.A. With numerous diagrams.