TABLE 48. 



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 h. 



TABLE 49. 



LEAST SQUARES. 



Values of the factor 0.6745\/-^. 

 \n 1 



This factor occurs in the equation e, = o.6745"V/ 3- for the probable error of a single observation, and other 



similar equations. 



SMITHSONIAN TABLES. 



