73 
15. R Persei . — The maxima of the present year occurred 
on April 27 and November 20 ; the first, however, 
was observed in the evening twilight, and the time 
may in consequence be slightly in error. It appears, 
therefore, that the period is about 205 ‘5 days, and 
that one period^nust be added to the number hitherto 
assumed to have happened since the date of Bessel’s 
observation. This correction, however, does not 
accord with an observation made at Bonn 1853, 
November^ 0, where the star was omitted in one of 
the zones observed by me, although it would then be 
near a maximum. But it was on that evening bright 
moonlight. 
24. R Aurigce . — This star has again had another double 
period. A maximum took place March 4, mag. 8'8 ; 
a minimum, June 7, mag. 9*4; and then a principal 
maximum on August 26, mag. 7‘0. The interval 
between my two observed principal maxima is 463 
days. 
30. R Gams minoris , — In its last minimum, 1866, March 
10, this star was of the 10th magnitude. The obser- 
tion of Oudemans, according to which it was then 
invisible, appears to rest upon an error. 
35, U Geminorum . — A very short maximum of this star 
occurred in April, 1866. On the 15th it was of its 
ordinary minimum brightness, or at most, but a very 
little brighter than usual. April 16 and 17 the 
weather at Mannheim was cloudy. 
April 18, at 8 h 18 m M. T. Mannheim, TJ was= 9*5 mag. 
11 
3 
}} 
» 
9*4 
19, 
8 
29 
}> 
9-7 
10 
36 
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>> 
9-7 
)> 
20, 
10 
41 
)> 
>> 
10-2 
» 
21, 
8 
58 
» 
- )} 
111 
7) 
23, 
8 
36 
>■> 
V 
130 
7? 
