AT THE OBSERVATORY AT PARAMATTA. 



47 



On December the 14th, 15th, 16th, l/th and 18th, I had repetitions on Venus 

 about the meridian, with Reichenbach's Circle, of which the abstract is sub- 

 joined. 



The above Zenith Distances are corrected for Refraction, but not for Parallax. 

 Tlie Reduction to the Meridian will serve to correct the Parallax. The culmi- 

 nations of Venus observed with the transit, have been corrected for semi-dia- 

 meter, and the hour angle thence deduced is corrected for the acceleration of 

 Venus above the fixed stars, which is here additive. It depends upon the rela- 

 tive situation of the Sun and Venus, whether in the repetitions left and right 

 the planet can always be obsei-ved on the same side of the wire, or v/hether 

 it must be observed alternately on different sides. The mean arc will be ac- 

 cordingly the zenith distance of the centre, or that of one of the limbs. 



Inferior Conjunction of Venus, July and August 1828, observed with the 

 Mural Circle and Transit at Paramatta. 



The lower limb of Venus has been observed throughout. The observed 

 Right Ascensions are those of the first limb before the conjunction, but after 

 conjunction those of the last limb of Venus. The Sun's Parallax has been 

 subtracted from his Refraction, but to Venus no Parallax has been applied. 



