Gore— Catalogue of Binary Stars, 8fc. 587 
33. 0. Struve, 298. None of the orbits given seem quite satis- 
factory. Some of the recorded measures are, however, very discordant. 
Some recent measures are : — 
1881-42 : 
350°-3 : 
0"-36, Burnham. 
1882-47 : 
7 
•5 : 
0 
•33, Schiaparelli. 
1883-517 
22 
•42 ; 
0 
•31, 
1883-65 
36 
•7 : 
0 
-17, Engelmann. 
1884-44 
49 
•0 : 
0 
-30, Perrotin. 
1884-507 
57 
•34 : 
0 
-31, Schiaparelli. 
1885-65 
60 
•9 : 
0 
•27, Engelmann. 
1886-68 
104 
•9 : 
0 
•29, 
1886-668 
133 
•68 : 
0 
•33, Schiaparelli. 
1887-558 
142 
•97 ; 
0 
•33, ,, 
34. y Coronae Eorealis = !S 1967. A close and difficult double star. 
As in the case of 42 Comae Eerenices, the plane of the orbit nearly 
passes through the earth. 
Burnham found, 
with 18^-inch refractor : — 
1879- 468, No certain elongation ; splendid night " ; 
1880- 482, ^' Single with V." ; Good night 
1880-559, „ 
and adds, " I found it single with the Madison 15^-inch on two nights 
1881-47." 
I do not know of any more recent measures. 
I find that the plane of the orbit is at right angles to the plane of 
the Milky Way. 
35. $ Scorpii = 1998, A complete revolution has been performed 
since its discovery by Sir W. Herschel in 1780. Dr. Doberck's elements 
are the best. The apparent orbit is a very elongated ellipse, owing to 
its high inclination, but the real orbit seems to be nearly circular. The 
more distant companion probably forms with the binary a ternary system. 
Some recent measures are : — 
AB. 
1880^40 
188r24 
1882-27 
1886-513 
1888-50 
189°-69 
191 -25 
193 -65 
198 -12 
20 -4 
r'-l7, Doberck. 
1 -03, „ 
1 -19, „ 
1 -28, Tarrant {A. iV., 2866). 
1 '24, Leavenworth. 
