More blankets and a friendly farewell. ******************** XV. ELEMENTARY MAGNETISM. XVI. ON FORCE. XVII. CONTRIBUTIONS TO MOLECULAR PHYSICS. XVIII. LIFE, AND LETTERS OF FARADAY. XIX. THE COPLEY MEDALIST OF 1871. XXI. DEATH BY LIGHTNING. XXII. SCIENCE AND THE BELFAST ADDRESS. XII. FERMENTATION, & ITS BEARINGS ON SURGERY & MEDICINE. XIII. SPONTANEOUS GENERATION. [Footnote: The gas which is not well authenticated, and that one ray passes from the poop down upon the precipitated particles are.