162 



Astronomical and Nuulical Coi/ecliuns. 



iii. Mr. Rumker's rediscovery of Encke's triennial Comet. 

 In a Letter to the Editor. (See Collections IV. ii.) 



Summer Solstice, 1822, observed in Paramatta Obser- 

 vatory, with a repeating circle of Reichenbach. The observa- 

 tions of the Solstice are partly by the Governor, partly by 

 myself. 



Mean .... 57 16 32.687 

 Lunisolarnutation — 6.77 



Reduction to Jan. 1, 1822 . 57 16 25.917 



+ 0.22 



Mean Z. D. of Tropic of s ... 57 16 26.137 

 TheWinterSols. givesm.Z.D.ofTrop. ofYJlO 21 2.237 



Difference ... 46 55 23.9 

 Hence mean obliq. Jan. 1, 1822, 23 27 41.95 



Supposing the mean obliquity Jan. 1, 1822, to have been 

 23 27 44.26, we obtain for lat. of the observatory 33 48 41.97. 



I observed the following occultations of fixed stars at 

 Paramatta, 



J 



