POOR, THE FIGURE OF THE SUN 



405 



Table VI, continued. 



1871. 



1872. 



In the above tables the first column gives the date on which the plate 

 was taken; the second and third columns give the difference between the 

 polar and equatorial radii in arc, together with the mean error of this result 

 as determined from the separate measures; the third and last column gives 

 the relative weights of the different plates as determined from their mean 

 errors. The scale value differed for each plate, and was determined by 

 assuming that the value of the mean radius of the sun at distance unity is 

 equal to 961". Approximately one division of the scale is equal to 24".6 

 of arc. 



The different plates in each year give quite consistent results, but the 



