PREFACE Vll 



who read the Introduction in manuscript, for much 

 valuable suggestion and criticism; and I am more 

 than grateful to Professor Ritchie, of St. Andrews, 

 who read the whole book, both in manuscript and in 

 proof, and to whom it owes numerous improvements 

 as well in form as in matter. 



I have adopted the spelling 'Leibniz' in place of 

 the traditional 'Leibnitz,' because the former was 

 invariably used by Leibniz in signing his own name. 



It ought perhaps also to be mentioned that Parts 

 II and III of the Introduction were accepted by the 

 University of Edinburgh as a thesis for the degree of 

 Doctor of Philosophy. 



ROBERT LATTA. 



UNIVERSITY OF ST. ANDREWS, 

 June, 1898. 









