210 



Captain W. S. Jacob on the 



The following 71 numbers are found to differ from the Bri- 

 tish Association Catalogue by more than 2 s in right ascension, 

 or 10" in polar distance, viz. : — 



15 



4968 



6212 



157 



4979 



6219 



193 



5114 



6303 



602 



5117 



6374 



728 



5288 



6578 



1412 



5372 



6818 



1790 



5389 



6928 



2048 



5459 



7017 



2121 



5540 



7055 



2190 



5564 



7163 



2284 



5570 



7180 



2610 



5612 



7268 



3008 



5722 



7307 



3067 



5879 



7347 



3139 



5897 



7594 



3:189 



5898 



7631 



3567 



5916 



7699 



3639 



5977 



7769 



3659 



6000 



8011 



3694 



6011 



8164 



4041 



6032 



8260 



4512 



6165 



8278 



4.519 



6173 



8306 



4912 



6185 





Of these, 17 are accounted for as mistakes of gross quanti- 

 ties, such as l m , 30 s , or 10 s of right ascension ; and 10', 5', or 

 V of polar distance. Several others may possibly be corrected 

 by a reference to Lacaille's original observations, and some of 

 them are probably cases of proper motion. Besides these, there 

 are 29 stars from Brisbane's Catalogue, in which the difference 

 of right ascension is between I s and 2 s ; some of these also 

 may turn out to be cases of proper motion. 



With the above exceptions, the agreement of the observed 

 places with the Catalogue is in general very close. In the cases 

 of those stars whose places depend upon Groombridge remark- 

 ably so ; a difference of S, 2 in right ascension, or of 2" in 

 polar distance being comparatively rare ; so much so as to ren- 

 der it probable that anything much exceeding that amount 

 must arise from proper motion. With regard to this point, 

 the proper motions assigned in the Catalogue have been in a 



