4 PREFACE. 



its predecessor, would prove too technical for 

 readers who have not had the instructions of 

 the primary work, and as the unauthorized 

 edition was neither complete nor credited to 

 me, I have thought best to meet the case by 

 the complete re-arrangement offered herewith. 

 In these pages I have not only endeavored 

 to render my meaning clear by full explana- 

 tions of the theories advanced, but have also 

 incorporated in the index a glossary of terms 

 used. 



Cincinnati, March 25, 1882. 



