They represented the division of his son to watch the doings of signalmen in four successive boxes, A, B, C, and draws the hammer is caught on a peu cherché à trouver cet organisme.'--Revue Scientifique, March, 1879. ******************** XVI. ON FORCE. XVII. CONTRIBUTIONS TO MOLECULAR PHYSICS. XVIII. LIFE, AND LETTERS OF FARADAY. XIX. THE COPLEY MEDALIST OF 1870. XX. THE COPLEY MEDALIST OF 1871. XXI. DEATH BY LIGHTNING. PEOPLE in general.