mm TRANSLATOR'S PREFACE. 



add such additional Commentary as they may have to offer, 

 in a " General Appendix" at the end of the work. 



No alteration has been made in the expression of the 

 measurements, for which the Paris line, equal to about T ' T th 

 (00888138) of an English inch (and now very generally 

 adopted on the continent), is taken as the unit; nor in the 

 signs " for 'of a line/ and " for f of an inch/ the great con- 

 venience of which will probably lead to their more general 

 acceptance. 



LOXDOX ; August 1st, ] 5 



