CONTENTS 



Ctutpte Fug* 



I . Mysticism and Logic i 



II. The Place of Science in a Liberal Education 33 



III A Free Man's Worship 46 



IV. The Study oj Mathematics 58 



V. Mathematics and the Metaphysicians 74 



VI. On Scientific Method in Philosophy 97 



VII. The Ultimate Constituents of Matter 125 



VIII. The Relation of Sense-data to Physics 145 



IX. On the Notion of Cause 180 



X. Knowledge by Acquaintance and Knowledge 



by Description 209 



