254 E. LINDEMANN, ÜBER DEN LICHTWECHSEL VON 9 LYRAE (sam 
demnach die im Mittel erhaltenen Helligkeiten dieses Sterns in Stufen- 
werthen des Beobachters angeführt sind: 
1888. 
Juni 20.42 8.5 October 1.36 8.3 
5.47 9.8 3:35 4.3 
Juli 13.47 6.5. 5:35 7.0 
15.42 10.3 6.39 8.7 
20.41 ert dd GK d 
27.46 9.0 11.40 3.0 
29.4] 9.3 13.59 8.0 
31.45 2.0 19.27 10.2 
August 3.40 10.3 21.28 8.5 
: 7.44 3.0 24.29 4.3 
8.52 4.3 29.28 8.2 
14.41 8.5 November 5.30 0.0 
19.44 1.0 6.28 2:7 
24.42 8.2 7.237 6.5 
30.38 9.2 8,27 8.3 
September 1.48 0.5 9.27 8.3 
11.38 10.5 10.27 8.7 
13.38 5.0 12.35 8.0 
14,57 2.0 SOOT 9.5 
17.35 10.5 December 3.24 8.7 
18.38 10.0 29 5.0 
20.36 7.0 hut 4.7 
21.33 6.5 8.27 6.9 
24.99 10.0 9.28 10.0 
23.36 10.3 II 10.0 
25.38 8.0 FY2T 8.5 
26.32 4.0 14.25 0.0 
27.35 1.5 27.26 2.0 
30.42 9.3 29.24. 10.0 
1889. 
Januar 1.77 3.5 April 20.45 9.0 
2.24 T:D 23.41 5:7 
3.24 8.5 24.41 8.3 
4.76 9.3 Mai 2.47 9.0 
5.7.0 10.2 6.43 8.3 
6.25 1.0 21.44 9.5 
12.73 9.0 2241 8.5 
16.75 9.3 23.47 5.7 
Februar 1.74 9.2 27.47 9.8 
Mélanges mathém. et astron, T, VII, p. 480. 
