Mr. Moseley on the Star Algol. 185 
is different at different times; and Mr. Pigot remarks, that it 
sometimes is more /wminous than Persei. It is convenient to 
place abar in the eye-piece of the telescope, of such diameter as 
just to cover a star of the fourth magnitude; the enlargement will 
then be more distinctly perceived in its progress ; but it will re- 
quire considerable experience to mark the extremes satisfactorily. 
The table is reduced to mean time at Greenwich. The recurrence 
of the most diminished light is given to the nearest minute ; and 
on those days only when the star may be distinctly seen at the 
expected hour. 
1824. 
H. M. 
April 14 . 10.25 
17 es . 7.14 
May 7 en ioc 
24 13.51 
June 13 15.34 
16 : 12.23 
19 “ 9.12 
July 6 14. 6 
9 10.54 
26 15.48 
EA ate : SBM ei 
August 1. : «e926 
Vie : - 14.20 
20 11. 9 
23 . 7.58 
" Sept) °7 16. 3 
10 ; 12. 52 
GATOS sae A ae 
16 6.30 
“| beg you will dispose of this account as you think proper, and 
Vou. XVII. O y 
