362 Mr. South’s re-examination of the apparent distances 
No. XXIV. R. A. i7 h 4 m ; Decl. 26 0 18' S. 
36 Ophiuchi ; H. and S. 243. 
continued. 
suppose, that the star was by one and the other observed as 
single ; our observations therefore must be corrected by half 
the difference of declination, and by half the difference of 
right ascension, which with the preceding distance, and 
position 41 0 32' will be i".724 in declination, and i". 946 on 
the parallel, equal to o".i47 of right ascension in time. 
For the star 38 Ophiuchi no correction of this sort will be 
required : its smaller star was certainly neither seen by 
Bradley nor by Piazzi ; and its magnitude, even were it at 
the time closer than it now is, would not sensibly alter the 
apparent centre of the disc of A of 38. 
But the differences of declination observed by us are un- 
corrected for refraction : the necessary equations being 
applied, we get, 
Diff. of decl. of A of 36 Ophiuchi & of 3oScorpii 3' 2". 403 
. . & A of 38 Ophiuchi 5' 25 /7 .764 ; 
and when the corrections to reduce these results to observa- 
tions of the centre of the two stars of 36 Ophiuchi are 
applied, the quantities become 3' 4". 127 and 5' 24".o4o for 
the differences of declination ; and for differences of right 
ascension (in time) 52". 591 and 2' ii".qo5 respectively. 
Now by Bessel’s proper motion,* the difference of declina- 
tion of 36 Ophiuchi and of 30 Scorpii, Epoch 1825.57, should 
be 3' 4''. 930, differing with our determination only 8-tenths of 
a second : hence in declination, the two stars have either the 
same, or no proper motion. 
But Bessel does not give the proper motion in right 
ascension, for it appears that BRADLEY-f did not observe the 
* Vide Fundam. Astronom. page 31 1 
f In Bradley’s published observations I have not met with any observed R. A. 
of 30 Scorpii, nor have I found any observation of 38 Ophiuchi, in the manuscript 
