AT THE OBSERVATORY AT PARAMATTA. 



^ 



Northern Solstice, June 1827. 



Southern Solstice, December 1827. 

 Observed alternately direct and by reflection. 



1827. 



True Meridian 

 Zenith Dist. of 

 Sun's Centre. 



Corr. for 



Sun's 

 Latitude. 



Reduction to 



Solstice. 



True Zenith Dist. 

 of Tropic of 



Cancer, 



1827. 



True Meridian 



Zenith Dist. of 



Sun's Centre. 



Corr. for 



Sun's 

 Latitude. 



Reduction to 

 Solstice. 



True Zenith Dis- 

 tance of Tropic 

 of Capricorn. 



June 13 

 14 

 15 

 16 



18 

 19 

 21 



24 

 25 

 26 



27 

 28 

 29 



56 58 63.58 



57 2 27.50 



5 37.91 



8 20.11 



12 33.00 



14 2.6 



15 69.53 

 15 32.6 

 14 36.52 



13 14.1 

 11 33.06 



9 17.1 



6 38.56 



-0.65 

 0.67 

 0.66 

 0.64 

 0.35 

 0.20 



—0.08 



+ 0.42 

 0.50 

 0.59 

 0.67 

 0.68 



+ 0.67 



+ 17 24. 



13 50. 



10 40. 



7 54, 



3 37. 



2 5. 

 17. 



40 



1 38, 



3 0, 



4 47, 

 6 59, 



+ 9 35, 



5"^ 



16 17.52 



„ 16.96 



„ 17.30 



„ 14.00 



„ 10.04 



„ 8.36 



„ 16.91 



„ 13.90 



„ 15.32 



„ 15.18 



„ 21.09 



„ 16.91 



„ 14.52 



Dec. 



Mean 



Luni-solar nutation 



Reduction, Jan. 1, 1827 . 



57 16 15.2 

 + 7.5 

 + 0.26 



Mean zenith distance of Tropic of Can- 

 cer, Jan. 1, 1827 



From former observation of Tropic of 

 Capricorn, Jan. 1, 1827 



Half diff. mean obliquity, Jan. 1, 1827 .. 

 Half sum latitude of the observation 



57 16 22.96 

 10 20 57.91 



3 

 6 



7 

 8 

 9 

 10 

 12 

 13 

 14 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 24 

 25 



11 



10 



49 13.01 



24 24.66 

 17 13.47 

 10 13.9 



3 39.44 

 67 45.72 

 47 0.92 

 42 19.98 

 38 8.83 

 31 5.41 

 28 16.78 



25 55.54 

 24 2.97 

 22 41.49 

 21 46..S6 



8.11 

 11.99 



21 41.09 



22 51.85 

 28 29.21 



21 

 21 



+ 0.4 



0.77 



0.8 



0.82 



0.81 



076 



0.57 



0.44 



0.30 



+ 0.0 



—0.15 



0.29 



0.41 



0.49 



0.52 



0.53 



0.51 



0.44 



—0.36 



+ 0.05 



1 27 

 1 3 

 „ 55 

 „ 49 

 „42 

 „ 36 

 „ 25 

 „ 21 

 „ 16 

 ., 9 

 „ 7 

 » 4 

 „ 2 

 „ 1 

 „ 

 „ 

 „ 

 „ 

 ,. 1 

 „ 7 



57.8 



17.25 



55.8 



0.65 

 32.15 

 30.5 

 47.9 



8.3 

 55.97 

 54.24 



6.17 

 44.51 

 51.80 

 27.33 

 31.15 



3.30 



3.79 

 32.64 

 29.78 

 10.84 



10 



15.60 



8.18 



18.47 



14.12 



8.10 



15.98 



13.59 



12.12 



13.16 



11.17 



14.01 



10.74 



10.76 



13.67 



14.69 



4.28 



7.69 



8.01 



21.71 



18.32 



Luni-solar nutation . 



23 27 42.52 

 33 48 40.43 



10 21 12.718 

 - 8.51 



Mean zenith distance of Tropic of Capric. 

 Mean zenith distance of Cancer from 

 all preceding observation 



10 21 4.20 

 57 16 24.8 



Half sum latitude of the observatory. 



33 48 44.5 



L 



But by applying to the above zenith distance 1 0° 21' 4".20, 

 the mean obliquity 23° 27' 43". 1 found with the mural 

 we obtain 33° 48' 47".4 for latitude. 



Remarks. — ^To avoid misconstruction, I remark, that the corrections for sun's 

 latitude, reduction to solstice, luni-solar nutation, and reductions to the com- 

 mencement of the respective years, have always been applied with the signs 

 adapted for finding the zenith distance of the mean tropic. Thus the cor- 

 rection for the sun's latitude is always applied with the opposite sign, and the 

 luni-solar nutation in the southern solstice with the same sign, but in the 

 northern solstice with the opposite sign, to what the solar tables give. 



