OBSERVATIONS. 



clxv 



Making use of the equator points in the fifth column of the preceding table, we obtain the 

 series of Mars observations at Athens in the annexed form. 



MARS I. 



Observations with the Athens Meridian-Circle. 



These eight series include all the materials available for our purpose, which are derived from 

 observations of Mars during the opposition of 1849-50, and we pass to the second series of 

 observations during the opposition of 1851-2. 



II. SECOND SERIES OF OBSERVATIONS OF MARS. 



We have seven sets of observations during this opposition, instead of eight, as in the first series, 

 there having been no observations at Athens or Cambridge, nor with the equatorial at the Cape 

 of Good Hope, while, on the other hand, the prompt repair and return of the eye-piece had 

 restored Lieut. Gilliss's meridian-circle to usefulness, and the Astronomische Nachrichten, xxxv, 

 p. 269, affords a series of meridian observations at Kremsmunster. 



