and positions 0/458 double and triple stars , &c. 203 
No. DCLXXX. R. A. 1 6 h S5 m ; Decl. 13° 58' N. 
Nova ; 
Double; 9th and 13th magnitudes. 
Passy ; June 9, 1825 ; Seven-feet Equatorial. 
Position = 65° 26' np 
Distance rz 1 3"*5 3 5 
The night is very favourable, but the small star will not bear the slightest illumi- 
mination ; hence the results are liable to some inaccuracy. 
5 Obs. 
Diff. = 
i°i4 X 
5 Obs. 
Diff. = 
0". 5 2 9 5 
Passy; June 12, 1825 ; Seven-feet Equatorial. 
9th and 1 2th magnitudes. 
5 Obs. I Diff. = i° 32') . 
5 Obs. I Diff. = 1 ".274 5 Excessive b difficult. 
Observed on the meridian. Night fine ; but neither star bears much illumination. 
Mean Result. 
Position 65 0 36' np ; Distance 13".929 ; Epoch 1825.45. 
Position =65° 46 np 
Distance = i4''.323 
No. DCLXXXI. R. A. 1 6 h 38 m ; Decl. 28° 4a 7 N. 
4 6 Herculis ; Struve, 532 ; I. 79. 
Double ; 7th and 12th magnitudes ; small star decidedly blue, 
and becomes much more distinct by slight illumination. 
Blackman-street ; April 28, 1824 ; Five-feet Equatorial. 
Position = 73 0 46 ' s f 
Distances 4". 3 96 
5 Obs. 
5 Obs. 
Diff. = 3 0 30' 
Diff. — T.073 
> Extremely 
difficult. 
Observed when 3 h 10' east of the meridian; the results must therefore not be 
deemed standard. 
Blackman-street ; June 29, 1824 ; Five-feet Equatorial. 
7 th and 1 Oth magnitudes. 
Position = 71 0 8' sf I 5 Obs. Diff. = 3 0 o' ] By twilight. 
Position = 70° 44' sf | 5 Obs. Diff. = 5° 53' f By lamp illumination. 
The first series was observed when the stars were one hour east of the meridian. 
without artificial illumination; the last when they were 35 minutes distant from 
it. During strong twilight the blue colour of the small star was very decided. 
