ERRATA 



Page 439, line 8 from the bottom, third word in the line; for arc read time. 



Page 445, in last formula ; insert -f between w and the fraction. 



Page 455, in values of \ Class II., Jan. 14: in set 4,/or 42.991 read 11 II j in got ^ 42.W7'J r«nl 41 



Page 457, in value of A, Class II., Jan. 28 ; for 42.152 read 48.152* 



In the same table, on the right hand column, Division 13, opposite Jan. - 1. I'J.OHflnrf 4 • 



>r 42.086 raid 43.086. 



Page 458, in values of (A— z) t opposite Jan. 14; for 110.173 read 111.173, and>r 110.181 read ULUl 



At the bottom of same page, in the column (T'—T% opposite 1 b.»,>*r— 8 > «, (-9.799 opparitt 



Feb. 10, /or — 10.277 read -f 10.277. 

 Page 464, in line of means in the table : under Jan. 14, for 1.200 read 1.100; under Jan. 1.178 rrad l.ltt. 



dkct th< 



On page 452, the first normal equation for obtaining the weight of A0 should be A0+ .616a — ^ (or «4ftJ «*Q. 



r 





value of ju (or the weight of Ad) is 19.86. Therefore, r ■= ^ = 0'.0l!7. 



Ige and tbi // 



Rate should have the sign minus prefixed to them. It should be understood that th Bm i h M \ &» *U f*i 

 are the approximate values used in computing K}, and not the corrected ra l used in JcoUting the Ion? s • 

 The values found for the differences of longitude are' not affected in any way by these MTH 



