11 PREFACE. 



structed them, in a definite manner, from terms that always 

 exist, although it was necessary sometimes to use two or 

 more words, and thus the terms constructed have become 

 long ones. There is a logical relation between a fact and 

 its term, and the students may be taught this very easily. 



We must express our thanks to Mr. J. N. Seymour for 

 his kindness in correcting the manuscript. 



Tokyo, February, xxviS year of Meiji (1893). 



