48 TABLE 24. 



LEAST SQUARES. 



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

 x I r where r is the " probable error." The probable error r is equal to 0.476947 Jt. 



TABLE 25. 

 LEAST SQUARES. 



Values of the factor o.6745\/-^r . 



\ 1 



This factor occurs in the equation * =r o.6j4S\ for tne probable error of a single observation, and other 



j| n i 

 similar equations. 



SMITHSONIAN TABLES. 



