X EDITORS PREFACE TO SECOND EDITION. 



published rather later, and, in the meantime, had been some- 

 what modified. We therefore made a fresh translation of the 

 essay in its final form, although we are pleased to acknowledge 

 the assistance derived from the translation in * Nature.' 



We have to thank Frau Liiroth of Freiburg i. Br., and Miss 

 Lilian J. Gould, for their kind help in translating two of the 

 essays. Colonel Ewing kindly assisted us in the correct ren- 

 dering of man}^ sentences in the Essay on the Musical Sense, 

 and Dr. II. Gadow also aftbrded us great help. 



E. B. P. 

 I A. E. S. 



Oxford, July, 1891. 



