TABLE 24. 



57 



LEAST SQUARES. 



This table gives the values of the probability P, as defined in last table, corresponding to different values of 

 xl r where r is the " probable error." The probable error r is equal to 0.47694; h. 



TABLE 25. 

 LEAST SQUARES. 



Values ol the factor 0.6745-1/^1. 



This factor occurs in the equation r e = 0.6745-%/^i for the probable error of a single observation, and other 



similar equations. 



SMITHSONIAN TABLES. 



