44 



MR. RUMKER'S OBSERVATIONS 

 Northern Solstice, June 1827. 



1827. 



Barom. 



Inside 

 Ther. 



Out- 

 side 

 Ther. 



Observed Mean 

 of the four Mi- 

 croscopes. 



Bessel's 

 Refract. 



Paral. 



Semidia- Reduction to 

 meter. { Solstice. 



Cor. for 

 Sun's 

 Lat. 



Apt. Obliquity 

 not corr. for 

 Polar Point. 



June 1 



2 



3 



5 



8 



13 



14 



15 



16 



18 



inches. 

 30.313 

 30.246 

 30.134 

 30.076 

 30.152 

 30.105 

 29.797 

 20.828 

 30.034 

 30.232 



68 



56.5 



56 



59 



55 



60 



62 



66.6 



69.5 



61.5 



57.5 



55 



65 



58.5 



58 



112 25 32.7 

 33 55.95 

 41 43.82 

 24 58.62 

 44 5.85 

 8 12.25 

 43 17.55 

 46 26.72 

 17 35.2 

 53 28.12 



113 



24.98 

 24.99 

 24.11 

 22.70 

 25.32 

 27.01 

 28.79 

 27.03 

 27.30 

 30.08 



7.04 

 7.04 

 7.15 

 7.12 

 7.15 

 7.19 

 7.23 

 7.23 

 7.20 

 7.25 



-15 47.6 



„ 47.5 



„ 47.4 



„ 47.1 



„ 46.9 



„ 46.3 



„ 46.24 



„ 46.13 



„ 46.02 



„ 45.96 



1 31 

 „23 

 „ 15 

 „ 

 41 

 .. 17 

 „ 13 

 „ 10 

 7 

 3 



36 



15.3 



17.85 



33.0 



22.35 



24.65 



50.03 



39.9 



54.39 



37.34 



+ 0.68 

 0.65 

 0.60 

 0.39 



—0.08 

 0.65 

 0.67 

 0.68 

 0.64 

 0.53 



23 42 39.72 



„ 42.25 



„ 31.83 



„ 34.69 



„ 33.19 



„ 42.37 



„ 42.22 



„ 39.61 



„ 36.07 



„ 41.77 



19 



21 

 24 

 25 

 26 



27 

 28 

 29 

 July 2 

 4 

 11 



30.205 



29.96 



29.864 



30.206 



30.029 



30.04 



30.00 



29.973 



29.52 



30..34 



54 



54 



30.074 55 



58 

 63 



.8 

 59 

 60 

 60.5 

 54 

 52 

 59 

 58 

 56 



„ 23 22.2 



„ 56 40.15 



„ 24 50.25 



„ 23 54.6 



„ 53 56.52 



„ 52 14.02 



„ 50 5.42 



„ 15 54.38 

 „ 5 48.0 



112 56 49.72 



„ 44 58.95 



28.27 



28.43 



26.79 



27.93 



29.30 



29.25 



29.90 



28.3 



28.95 



27.15 



26.21 



7.21 

 7-25 

 7.21 

 7.21 

 7.25 

 7.25 

 7.25 

 7.20 

 7.17 

 7.18 

 7.17 



45.9 



45.8 



45.65 



45.6 



45.58 



45.57 



45.55 



45.53 



45.5 



45.6 



45.7 



2 5.905 

 17.66 



40.905 



1 38 36 



3 0.57 



4 47.52 

 6 59.12 

 9 35.37 



19 50.9 

 28 42.5 

 12 12.8 



—0.32 

 0.04 



+ 0.43 

 0.51 

 0.59 

 0.67 

 0.69 

 0.67 

 0.42 



+ 0.13 



-0.70 



Apparent obliquity 23° 27' 36".18 



Luni-solar nutation +7 .5 



Reduction to Jan. 1, 1828... —0 .26 



Mean 



Polar point per circumpolar stars 



34.74 



33.15 



.36.815 



39.79 



34.15 



38.64 



42.33 



37.05 



46.60 



37.92 



44.39 



23 42 38.54 

 — 15 2.36 



Mean obliquity, Jan. 1, 1828 23 27 43 .42 



Southern Solstice, December 1827- 



1827. 



Therm. 



Semidiam. 



Hefr. 

 Par. 



Reduction to 

 Solstice. 



Corr. for 

 Sun's 

 Lat. 



3. P. D. of Tropic not corrected for Polar Point. 



III. 



IV. 



Mean of four 

 Microscopes. 



Dec. 3 



9 

 10 

 12 L 



13 

 14 



16 

 17 



18 

 19 

 20 

 21 

 22 

 23 

 25 

 28 



inches. 



29.948 



29.927 



30.028 



29.99 



29.928 



29.742 



29.70 



29.606 



29.577 



29.784 



30.223 

 30.19 



29.97 



29.772 



29.65 



29.853 



29.726 



29.892 



29.706 



30.034 



76 



77 

 74 

 83 

 90 

 100 

 84.3 

 90.5 

 99.5 

 80.5 



16 



91.3 



86 



96 

 103.7 



82.5 



73 



83 



84 

 102 



83.3 



15.6 



15.87 



16.0 



16.13 



16.27 



16.36 



16.49 



16.73 



16.84 



17.02 



9.92 

 9.64 

 9.17 



8.8 



8.51 



8.11 



8.83 



8.54 



7.66 



8.68 



1 27 

 „ II 

 „ 3 

 55 

 „49 

 „42 

 „36 

 „25 

 „21 

 .. 16 



57.8 

 5.06 

 17.25 

 55.8 

 0.65 

 32.16 

 30.5 

 47.9 

 8.3 

 55.97 



+ 0.4 

 0.68 

 0.77 

 0.80 

 0.82 

 0.81 

 0.76 

 0.57 

 0.44 



+ 0.30 



66 



17.11 

 17.19 

 17.28 

 17.36 

 17.44 

 17.50 

 17.62 

 17.67 

 17.07 

 17.86 



8.03 

 8.63 

 8.18 

 7.91 

 7.86 

 8.66 

 7.82 

 8.37 

 7.89 

 8.37 



9 54.24 

 7 6.17 

 4 44.51 

 2 51.8 

 27.33 

 31.15 

 3.30 

 3.79 

 29.78 

 10.84 



0.00 

 —0.15 

 0.29 

 0.41 

 0.49 

 0.52 

 0.63 

 0.51 

 0.36 

 + 0.05 



47 6.42 



46 59.13 



47 3.17 

 46 54.9 



46 57.22 



47 5.91 

 47 6.56 

 46 67.57 

 46 58.94 

 46 54.5 



9.22 



7.43 



8.17 



57.94 



7.72 



14.41 



13,26 



7.97 



7.66 



9.0 



47 11.22 

 „ 4.13 

 „ 5.17 



46 59.9 



47 2.32 

 „ 6.91 

 ,. 4.66 

 „ 6.57 



46 57.84 



47 11.6 



Mean 



Polar point per circumpolar stars 



MeanS.P.D. of Tropic of Capricorn 60° 32' 17".208 



Mean S.P.D. of Cancer from last Solstice 113 27 43.42 



Half diff. mean obliquity, Jan. 1, 1S28 ... 23 27 43.108 



46 56.81 



47 5.12 



46 59.3 



47 1.4 

 46 57.3 

 46 59.08 

 46 52.87 

 46 54.39 



46 51.64 



47 1.95 



66 46 69.21 

 14 37.14 



9.7 

 8.82 



10.3 

 9.9 

 8.6 



10.18 

 7.17 

 3.89 

 8.64 

 6.35 



47 8.26 

 14 41.05 



66 32 22.07 32 27.21 32 26.18 32 28.39 

 Luni-solar nutation 



46 59.6 



47 3.52 



„ 9.1 

 „ 12.4 

 „ 6.6 

 „ ■ 9.78 

 „ 1.47 



46 66.09 



47 6.64 

 46 58.05 



47 



10.92 

 6.38 

 13.67 

 4.4 

 7.12 

 17.41 

 13.6 

 11.47 

 6.64 

 17.7 



47 9.445 

 „ 4.277 

 „ 7.545 



46 59.285 



47 3.595 

 „ 11.16 

 „ 9.52 

 „ 5.895 

 „ 2.77 

 ,. 8.2 



6.7 



12.12 



15.1 



14.0 

 7.3 

 9.18 

 6.17 

 6.89 

 5.84 

 7.75 



3.2 



7.39 



8.45 



9.42 



4.925 



7.055 



1.92 



0.065 



3.165 



3.275 



47 4.673 47 9.968 47 6.628 

 14 39.49 14 41.58 14 39.81 



32 25.718 

 -8.51 



