1 ^ A Mr. Pi GOT T ■ s Ohfervatiom 



•J • 



Hours, 



1784^ Sept. 30. at 1 81 



Od". 1 5. at 14 /Similar Obfervntions to that of 178^ 



Od. 22* at 19 /■ July 27th, at 10 h. — > i? Antinol being 



Nov. 12. at 1 4 1 equal to or rather lefs than /3 Aqullae* , 



Nov. 19. at 14 ) ' 



In eftimatlng the abov^ times, I paid much attention to the 



obfervations of the preceding and following days ; however, a 



few hours more or lefs do not make a material difference. Ti^ 



•refults of thefe comparifons are 

 D. H. Mi 



oB^; 



t)n a mean 7 4 38- length of a fingle perio^^ 



As this approaches the moft to the .preceding refult, it may be 

 aflumed as neareft the truth, provided the changes be uni- 

 'formly periodical. 



Hitherto the opinion of aftronomers concerning the changes 

 of Algol's light fecm to be very unfettled ; at leafl none are 

 univerfally adopted, though various are the hypothefes to 

 account for it ; fuch, as fuppofing the ftar of fome other than 



a fpherica! 



