OP ARTS AND SCIENCES. 



227 



TABLE III. 



But it is needless to multiply these examples further. The method, 

 in combination with that of residual curves, may be ajjplied to almost 

 any case where an empirical formula is to be deduced, and enables us 

 to find the best values of two of the constants. A wide field seems to 

 be open for it in astronomy ; and it is to be regretted that heretofore 

 astronomers should have neglected the graphical methods of discussing 

 errors, as much as physicists have overlooked the more rigid analytical 

 methods. 



