Estates in the presence of men. ******************** XII. ON CRYSTALLINE AND SLATY CLEAVAGE. XIII. ON PARAMAGNETIC AND DIAMAGNETIC FORCES. XIV. PHYSICAL BASIS OF SOLAR CHEMISTRY. 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 MAN. [Footnote: Presidential Address, delivered before the Birmingham and Midland Institute, October 1877; with.