30 TRANSLATOR'S PREFACE. 



The translator will give some extracts 

 from the preface to M. De Willisen's transla- 

 tion, as it shows that some of the difficulties 

 met with by the former were not altogether 

 escaped by his German confrere. 



" After positive results had proved to me 

 most convincingly that M. Baucher's was 

 the best of all existing methods, I thought 

 that it would be useful to translate it. This 

 translation seemed at first much easier than 

 it proved in the sequel; above all, it was 

 actually impossible for me to render in 

 German, as I wished, such technical French 

 expressions as attaques, acculement, assou- 

 plissement, rainener, rassembler, &c., retain- 

 ing their clearness and conciseness. In 

 German, I could only find expressions that 

 were incomplete. On this account, I have 

 put all the words, for which I could not find 

 a clear equivalent in German, in the original 

 French. 



