CONTENTS. 



I'AGK 



PROGRESS OF HUMAN KNOWLEDGE . . ... 1 



UNITY OF THE CREATIVE POWER THROUGHOUT CREATION . . 19 



PLURALITY OF WORLDS ARE OTHER PLANETS INHABITED ? . 26 



MATTER AND FORCE, IN PHYSICAL PHENOMENA . . . . 32 



ON MATTER, FORCE, AND MOTION IN SPACE . . 48 



DIVISIBILITY OF MATTER ATOMIC THEORY . . ... 62 



THE ELECTRIC ELEMENT . 81 



MENTAL OPERATIONS IN RELATION TO TIME . . . . . . 94 



ASTRONOMY AS A SCIENCE THE SUN 113 



LIFE ON THE EARTH RELATIONS OF MAN TQ OTHER ANIMALS . 125 



ANIMAL INSTINCTS 147 



EVIL IN THE WORLD . ... . . . . 162 



PERFECTIBILITY OF MAN . . '. . . . . . . 169 



INFINITY ETERNITY THE UNTHINKABLE . . . .190 



NATURAL THEOLOGY . 195 



MATERIALISM AS A QUESTION OF SCIENCE/ AND PHILOSOPHY . 206 



DIFFERENCES OF RELIGIOUS BELIEF . . . . . . 214 



SCEPTICISM AND CREDULITY . . . . . . . 219 



INSANITY . 225 



