TRANSLATORS PREFACE. Vll 



study. Thus the results arrived at are the fruit of 

 inquiry extending over a considerable period, and 

 embrace a vast array of carefully ascertained facts. 



The lessons derived from a study of these facts 

 are embodied in the present volume. It is a melan- 

 choly satisfaction to us to record the pleasure 

 we experienced at hearing these lessons explained 

 by the author himself, whether in the lecture room 

 or in the field. The teacher has passed away, 

 but his work remains, and if we have succeeded in 

 rendering this clear and intelligible, our object will 

 have been attained. 



A word now with respect to the technical terms 

 employed. Some of these are already current, and 

 have been adopted by general consent ; these it 

 would have been unwise to alter : others though 

 also expressing ideas of every day necessity, are 

 entirely new, either because no word existed pre- 

 viously to denote these ideas, or because those at 

 present in use are not sufficiently accurate or expres- 

 sive. It is not necessary to enumerate here the 

 reasons which in our opinion justify the adoption 

 of these new terms. We would ask our readers to 

 think of the importance of the subject-matter, rather 

 than to dwell upon the imperfections of the 

 translation. 



E. E. FEKNANDEZ. 

 A. SMYTHIES. 



