XXI. DEATH BY LIGHTNING. XXII. SCIENCE AND THE 'SPIRITS'. ******************** VOL. II. I. REFLECTIONS ON PRAYER AND NATURAL LAW. II MIRACLES AND SPECIAL PROVIDENCES. ADDITIONAL REMARKS ON MIRACLES. III ON PRAYER AS A FORM OF PHYSICAL ENERGY. IV. VITALITY. V. MATTER AND FORCE. VI. SCIENTIFIC MATERIALISM. VII. AN ADDRESS TO STUDENTS. VIII. SCIENTIFIC USE OF THE IMAGINATION. IX. THE BELFAST ADDRESS. X. APOLOGY FOR THE BELFAST ADDRESS. XI. THE REV. JAMES MARTINEAU AND THE BELFAST ADDRESS. XII. FERMENTATION, & ITS BEARINGS ON SURGERY & MEDICINE. XIII. SPONTANEOUS GENERATION. XIV. SCIENCE AND MAN. XV. PROFESSOR VIRCHOW AND EVOLUTION. XVI. THE ELECTRIC LIGHT. ******************** PREFACE TO THE SIXTH EDITION. TO AVOID unwieldiness of bulk this edition of the 'Fragments' is published in two volumes, instead of, as heretofore, in one. The first volume deals almost exclusively with the laws and phenomena of matter. The second trenches upon questions in which the phenomena of matter interlace more or less with those of mind. New Essays have been added, while old ones have been revised, and in part recast. To be clear, without being superficial, has been my aim throughout. In neither volume have I aspired to sit in the seat of the scornful, but rather to treat the questions touched upon with a tolerance, if not a reverence, befitting their difficulty and weight. Holding, as I do, the nebular hypothesis, I am logically bound to deduce the life of the world from forces inherent in the nebula. With this view, which is set forth in the second volume, it seemed but fair to associate the reasons which cause me to conclude that every attempt made in our day to generate life independently of antecedent life has utterly broken down. A discourse on the Electric Light winds up the Second volume. The incongruity of its position is to be referred to the lateness of its delivery. ******************** VOL. I. INORGANIC NATURE. I. THE CONSTITUTION OF NATURE. [Footnote: 'Fortnightly Review,' 1865, vol. iii. p. 129.]