40 



MR. RUMKER'S OBSERVATIONS 



Northern Solstice, June 1828. 



Southern Solstice, December 1828. 

 Observed alternately direct and by reflection. 



1828. 



True Meridian 

 Zenith Dist. of 

 Sun's Centre. 



Corr. for 



Sun's 

 Latitude. 



Heductlnnto True Zenith Dis. 

 Solstice. 1 tance of Tropic 

 of Cancer. 



1828. 



True Mer. Zen. 

 Distance of Sun's 

 Apparent Place. 



Corr. for 



Sun's 

 Latitude. 



Reduction to 

 Solstice. 



True Zenith Dls. 

 tance of Tropic 

 of Capricorn. 



June 12 

 13 

 14 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 25 

 26 

 28 

 29 

 30 



July 2 



56 



57 54.85 

 1 41.76 

 4 61.50 

 7 43.59 



10 9.9 



12 16.0 



13 50.08 

 15 8.69 



15 57.40 



16 17.50 

 15 57.30 

 13 24.6 



11 47.4 

 7 25.61 

 4 13.45 

 1 6.0 



52 59.4 



+ 0.17 

 0.31 

 0.42 

 0.49 

 0.53 

 0.50 

 0.49 

 0.43 

 0.28 

 0.16 



+ 0.04 



—0.38 

 0.53 

 0.75 

 0.81 

 0.83 



-0.73 



18 20.30 



14 39.18 

 11 23.35 



8 31.77 

 6 5.04 

 4 2.95 

 2 25.42 



1 12.99 

 25.1 

 2.2 

 4.08 



2 38.3 

 4 18.92 

 8 54.74 



11 48.96 



15 8..33 

 22 59.17 



Luni-solar nutation 



Mean zenith distance of Tropic of Cancer. 

 Mean obliquity 



Latitude 



57 16 15.32 

 21.25 

 15.27 

 15.85 

 15.47 

 19.45 

 10.00 

 22.10 

 22.78 

 19.66 

 1.42 

 2.52 

 5.79 

 19.6 

 1.61 

 „ 13.50 

 15 57.84 



« »J 



» J> 



it JJ 



J> >} 



i> J) 



» >J 



J) » 



57 16 13.46 

 + 9.3 



57 16 22.76 

 23 27 43.1 



33 48 39.66 



This solstice was observed partly by reflection. 



Dec. WJO 35 17.34 



15 „ 31 53.9 



16 „ 29 1.96 



17 „ 26 34.9 



18 „ 24 29.9 



19 „ 22 56.43 



20 „ 21 54.93 



21 „ 21 19.77 



-0.32 



—0.19 



-0.05 



+ 0.08 



0.24 



0.38 



0.50 



+ 0.59 



-14 2.37 

 10 38.92 

 7 43.36 

 5 15.73 

 3 16.41 

 1 45.20 

 42.15 



- 7.48 



10 21 14.65 

 14.80 

 18.55 

 19.25 

 13.73 

 11.61 

 13.28 

 12.88 



Luni-solar nutation . 



10 21 14.83 

 - 9.8 



Mean zenith dist. of Tropic of Capricorn 

 Mean obliquity 



10 21 5.03 



23 27 42.78 



Latitude 



33 48 47.81 



This solstice was interrupted on account of my depar- 

 ture. 



Solstices observed with the Mural Circle. 



The reductions of these solstices have been made as well with the view of 

 deducing the obliquity of the ecliptic from the polar point found by upper and 

 lower culminations of circumpolar stars, as to correct this polar point by an 

 assumed obliquity, for t|ie reduction of the stars observed with the mural 

 circle. 



