320 Mr. South’s re-examination of the apparent distances 
No. VI. R. A. 7 h 23 m ; Decl. 32 0 17 'N. 
Castor ; II. 1 ; H. and S. 81 . 
Double ; 3 rd and 4 th magnitudes. 
Passy ; February 18, 1825 ; Seven-feet Equatorial. 
Position = 7 0 8' sp | 10 Obs. | Diff. zi i° 54'. Tolerably steady. 
Observed within half an hour of either side of the meridian ; no other double 
star visible. During the measures, the larger star passed through all gradations 
of magnitude, between the third and ninth ; a circumstance which it is necessary to 
mention, as in taking the mean they ought not to be allowed a value, proportional 
to their number. 
Passy; March 31, 1825 ; Seven- feet Equatorial. 
3rd and 4th magnitudes. 
Position z= 6° 51' sp | 7 Obs. | DifF. — o° 59'. Tolerably steady. 
Observed when 12 minutes west of the meridian. 
Passy ; April 3, 1825 ; Seven-feet Equatorial. 
3rd and 4th magnitudes. 
Position = 5 ° 59 ' sp 
Distance = 4".489 
7 Obs. 
5 Obs. 
Diff. = i° 36' 
Diff. = o".529 
j By daylight. 
Stars beautifully defined, and as steady as possible ; the sun shining ; not a cloud 
visible : observations made with 787. 
Passy ; April 4, 1825 ; Seven-feet Equatorial. 
3rd and 4th magnitudes. 
Position = 7 0 3' s p 7 Obs. 
Distance = 4".796 5 Obs. 
Diff. = i°n' 
Diff. = o ". 2 88 
| Unsteady. 
Observed with 181, when 20 minntes west of the meridian. 
Passy; April 5, 1825 ; Seven-feet Equatorial. 
3rd and 4th magnitudes. 
Position = 6° 48 ' s p I 7 Obs. 
Distance 4". 95 8 | 5 Obs. 
Diff. = i° 24' ) 
Diff. 2 = o ". 4 8 1 5 
By twilight. 
Observed on the meridian with 787 ; stars exquisitely defined, and as steady as 
possible. 
Passy; April 6 , 1825 ; Seven-feet Equatorial. 
3rd and 4th magnitudes. 
Diff. = i°i8' ) B . . 
Diff. = o". 4 8 i 5 By da y h S ht 
The sun shining ; stars very steady, and extremely well defined. 
Observations made with 513, when 10 minutes east of the meridian. 
Position = 6° 22 sp 7 Obs. 
Distance 4". 826 | 5 Obs. 
