Burnham: Measures of Proper Motion Stars 
Comparing this with the three measures by 02 and H2, each 
on i n, we have for the proper motion of AB: 
o"477 in I59?2 
Some of the other values are: 
Auwers 
ol'448 
in 
159-4 
Bossert 
0-459 
in 
159-6 
Porter 
0-433 
in 
160.5 
Boss 
0-459 
in 
158.4 
7562. 22031 rej. (7.6...9.7) 
R. A. i6 h io m 9 s Decl. — i°2i' 
1910.356 
-395 
-397 
230°38 
230.22 
229.43 
2o"44 
20.74 
20.57 
1910.38 
230.01 
20.58 
The measures do not appear to show any proper motion in A 
A. G. Nico. 
o"io5 in 270!0 
7563. a Coronae Bor. 22032. (5.0...6.1) 
R. A. i6 h io m 11 
8 Decl. + 34° io' 
A and D (10.5) 
1908.288 
86?oS 63 "i6 
-331 
85.80 63.34 
-370 
85.78 63.40 
.383 
85.73 63.28 
1908.34 
85.85 63.29 
The seven sets of measures of this small star by 2, A Je, Do 
and |3 (1836 to 1908) should give a more accurate value of the 
proper motion of the principal star than that found by meridian 
observations. From the micrometer we have: 
o?276 
in 258?5 
Some of the results from meridian positions are: 
Auwers 
0^326 in 259?2 
Porter 
0.280 in 258.9 
Newcomb 
0.287 in 255.8 
Boss 
0.303 in 252.1 
7570. v Coronae Bor. Sh 223. 
(5.9---12.5) 
R. A. i6 h 
1 i m 56 s Decl. + 29 0 27' 
A and B 
1911.411 
28?26 
54"77 
-430 
28.05 
54-58 
• 433 
28.48 
54-25 
1911.42 
28.26 
54-53 
A and C (10.8) 
1911.411 
22?4I 
86"54 
• 430 
22.46 
86.27 
-433 
21.92 
86.63 
1911.42 
22.26 
86.48 
210 
A and D (10.o) 
1911.411 
• 430 
-433 
5G98 
5I-65 
51-75 
i2 3 "84 
123.61 
123.56 
1911.42 
51-79 
123.67 
C and E (11.5) 
1911.411 
226? 2 
I3"2 4 
-430 
225.1 
13-23 
■ 433 
224.7 
13-39 
1911.42 
225.3 
13.29 
Comparing the present positions with the prior measures by 
Doo and (3, we have for the annual change in the large star: 
AC R. A.+ o"on Decl. — o"o2i 
AD 0.016 0.026 
Therefore the proper motion of u Coronae is: 
o"o27 in 150!1 
The early measures by Sh have large errors in distance, and 
cannot be used in this connection. 
From the star catalogues we have: 
Auwers 
o"o 26 in 
I7i°4 
Boss 
0.028 in 
158.1 
7583. 
2 3103 rej. 
(8.8...9.7) 
R. A. 16' 
1 14™ 24 s 
Decl. — 3 0 40' 
1911.411 
305 °2 
24-67 
•4 T 4 
304.4 
24.36 
• 430 
304-4 
24.62 
1911.42 
304-7 
24-55 
7593. SD 
(3°) 3929- (7-6 
I... 8 . 7 ) 
R. A. i6 h i6 m 14 3 Decl.- 
-3° 58' 
A and B 
1910.225 
22?39 
101'(65 
.244 
22.15 
101.77 
.260 
22.50 
101.29 
.263 
22.40 
ioi.55 
1910.25 
22.36 
101.56 
1911.411 
22?8o 
ioi!'96 
.414 
22.37 
102.17 
-430 
22.30 
101.79 
-433 
22.42 
101.91 
1911.42 
22.47 
101.96 
1912.236 
22? 18 
102?02 
• 255 
22.40 
102.02 
• 274 
22.30 
102.17 
1912.25 
22.29 
102.07 
