on the Atmosphere of the Moon . 361 
on the 28th of March, five days after a new moon, I observed 
an occultation of a very distinct, though telescopic star, by the 
dark hemisphere of the moon, in which, agreeably to the above 
observation, not the least gradual diminution of light, or in- 
distinctness could be perceived, the star being seen to vanish 
on a sudden. 
Lilienthal, 
April 10, 1792. 
