OP ARTS AND SCIENCES. 



131 



(7) Oxford. — The Oxford Observations from 1858 to 1870. 



(8) Edinburgh. — The Edinburgh Observations from 18G0 to 1869. 



(9) Harvard College. — The Harvard College Observations for 1871. The 



places are taken from Ast. Nach., Nos. 1909 and 1947, except those for 

 aBootis, aScorpii, aOphiuchi, and aLyrae, which depend on the obser- 

 vations there given, and upon additional observations in 1872. The cor- 

 rections are as follows : — 



a Bootis = -+-.02^ 



a Scorpii = -(-.06 



a Ophiuchi = — .01 



o Lyrae = -1-.08 



On the following pages are arranged: — 



First, The assumed Right Ascension of each star ; and, under the 

 various authorities, the observed places in hundredths of seconds. 



Second, The residuals formed by subtracting the observed from the 

 assumed Right Ascensions. Instead of attempting to apply weights 

 proportional to the number of observations, discordant results which 

 depend on 3 observations or less are included in brackets, to indicate 

 their rejection. Beyond this, all observations are assumed to have 

 equal weight. 



