Rain they created an Indra, or giver of rain.--MAX MULLER. ***** I. REFLECTIONS ON PRAYER AS A FORM OF PHYSICAL ENERGY. IV. VITALITY. V. MATTER AND FORCE. VI. SCIENTIFIC MATERIALISM. VII. AN ADDRESS TO STUDENTS. [Footnote: Delivered at University College, London, on October 6, '1874, he, its principal, delivered an Address delivered by me before they.