PREFACE. (To be read before the lectures, although it in no way relates to them.) The reader from whom I expect something must possess three qualities: he must be calm and must read without haste; he must not be ever interposing his own personality and his own special "culture"; and he must not expect as the ultimate results of his study of these pages that he will be presented with a set of new formulæ. I do not propose to furnish... more...