196^ 



Celestial Phenomena from July 1. to Oct. 1. 1831. 



On the 3(1 of August, there will be an occultation of Aldebaran by the 

 Moon : 



D. H. / 



Immersion, 3. 6 31, at 161° 



Emersion, 6 54, at 204 



On the 9th of August, there will be an occultation of Mercury by the 

 Moon: 



D. H. I 



Immersion, 9. 7 34, at 110" 



Emersion, 7 59, at 156 



The angle denotes the point of the Moon's limb where the phenomena will 

 take place, reckoning from the vertex of the limb towards the right hand round 

 the circumference, as seen with a telescope which inverts. 



