
PHIL OS OO PH ICG A L 
T RAN SAVE TE O Nes! 

I. An Obfervation of the Variation of Light in the Star Algol. 
In. a Letter from Sir Henry C. Englefield, Bart. FR. S. 
and S, A. to Jofeph Planta, E/g. Sec. R. S. 
Read November 6, 1783. 
§ LR; | _ July 3, 1783; 
"AVING been fortunate ee from the finenefs of | 
the laft night, to make a fatisfactory obfervation of the. 
variation of Algol, I lofe no time in ee it to the 
Society. 
The laft vifible period was June sha roth, : when», Mr... 
AUBERT, as well as myfelf, obferved it, though imperfectly, 
~ Vor. LXXIV. B and 
