XVIII 



Occultation of Sjpica ly the Moon, observed at Salem, 



By NATHANIEL BOWDITCH, LL. D. 



T 



occultation was nearly central on the 



g of the 



"fifth of February 



The weather was remarkably clear, and 



the observations of the immersion and emersion (made with a four- 

 feet achromatic telescope) were remarkably good ; but the. weather 

 had previously been so inclement that the regulation of the chro- 

 uometer was not so accurate as I could have wished, and there 

 may be an uncertainty of four or five seconds in the times. 



The observations 



Immersion 0'' ±2 



13'^ apparent time. 



Emersion 



1 



0)«>. 



38 



a 



i( 



The latitude of the place of observation (near the north meet 

 g-house in Salem) is 43° 33' 30'^ The loi 



g 



East from Cambridge, or ^^^ 43' 37''' W. from Greenwich. 



these and the latitudes of the moon given in Burckhardt's tables 



53^ in time 



Using 



to 



5 place of the star as in the Nautical Almanac for 

 'ound by the Astronomer Royal, Mr. Pond, the ( 

 pplied to the moon's 



would be + 9 



longitude by Burckhardt's tables 



:A 



# 



