90 



MR. RUMKER'S OBSERVATIONS 



I Octantis. (Ann. Var. — 17".329.) — (Continued.) 



Superior Culmination. 



1827. 



May 25 



27 



June 1 



2 



7 

 29 



July 



inches. 

 30.104 



30.130 



30.30 



30.21 



30.13 



29.93 



30.34 



30.15 



29.93 



52 



48.5 



49 



48 



48.5 



40.0 



48 



52 



47.5 



Junel7'... Mean ... 

 Refract. — Reduct. 



Superior Culminat. 

 Inferior Culminat. 



Half DifF. S. P. D. 



Microscopes. 



I. 



o / // 



7 23 37 



., „ 45.7 



,. „ 46.0 



» „ 44.5 



„ „ 41.0 



„ „ 46.2 



„ „ 43.3 



„ „ 41.0 



„ „ 39.0 



7 23 42.63 

 -I 0.53 



7 22 42.10 

 353 7 05.0 



II. 



23 56.7 



23 58.3 



24 1.5 

 24 0.0 

 23 50.0 

 23 58.2 

 23 54.5 

 23 55 

 23 53.0 



23 56.4 

 1 0.5 



22 55.9 

 7 9.4 



7 7 48.55 7 53.2 



III. 



23 52.5 



24 0.4 

 24 5.0 

 24 3.0 

 23 56.7 

 23 56.5 

 23 56.3 

 23 53.7 

 23 49.0 



23 57.0 

 1 0.5 



22 56.5 

 7 8.5 



7 54.0 



IV. 



24 14.0 



„ 12.0 



„ 12.0 



„ 19.0 



„ 14.0 



„ 11.2 



„ 14.0 



„ 12.0 



„ 9.2 



24 13.04 

 1 0.53 



23 12.51 

 7 9.40 



8 1.5 



Inferior Culmination. 



1827. 



July 7 

 9 

 12 

 15 

 17 

 19 



Barom, 



inches 

 30.333 



30.27 



30.02 



29.69 



29.90 



29.90 



47 

 48 

 44 

 39 

 56 

 39.5 



July 13... Mean ... 

 Refract. + Reduct. 



Microscopes. 



353 9 16 

 „ ,, 14 

 „ „ 14 

 ,. „ 11 

 „ » 14.7 

 » » 8.3 



353 9 13.0 

 -2 8.0 



353 7 05.0 



11. 



/ // 

 9 20.0 



„ 18.0 



„ 18.4 



„ 13.3 



„ 20.5 



„ 15.0 



9 17.5 

 2 8.1 



7 9.4 



III. 



9 15 



,. 18 



,, 16.2 



„ 12.0 



„ 16.7 



„ 19.0 



9 16.5 

 2 8.0 



IV. 



9 20 



„ 18.5 



„ 17.0 



,, 15 



„ 19 



„ 16.7 



9 17.5 

 2 8.1 



7 9.4 



Mean of 4 Microscopes 7° 7' 54".34 by 15 Observ. 



1827. 



July 28 

 30 

 Aug. 1 



Barom. 



inches. 

 30.25 



30.01 



30.10 



49.5 



45 



42 



July 30 ... Mean 

 Refract. — Reduct. 



Superior Culminat. 

 Inferior Culminat. 



Half Diff. S. P. D. 



Microscopes. 



7 23 37 

 » » 37 

 » » 38 



7 23 37.3 



- 55.9 



7 22 41.4 

 353 7 2.3 



7 7 49.5.T 



II. 



23 49.7 

 „ 50.0 

 „ 52.0 



23 50.6 

 65.9 



22 54.7 

 7 7.3 



7 53.7 



III. 



24 1.0 

 23 50.5 

 23 47.0 



23 52.8 

 55.9 



22 56.9 

 7 4.9 



7 56.0 



IV. 



23 49 



24 7 

 24 3 



23 59.7 

 55.9 



23 3.8 



7 5.7 



7 59.05 



1827. 



July 27 

 31 



Aug. 1 

 17 



Barom, 



inches. 

 30.29 



30.04 



30.08 



30.102 



39 

 49 

 32 

 36.5 



Aug. 6 ... Mean ... 

 Refract, and Reduct. 



Microscopes. 



o / // 



353 9 13 



» „ 12 



.. ,. 14 



» „ 11 



353 9 12.5 

 -2 10.2 



353 7 2.3 



II. 



9 19 



„ 14 



„ 18.9 



„ 18.0 



9 17.5 

 2 10.2 



III. 



9 14 

 ,, 11 

 „ 20.3 

 „ 15 



9 15.1 

 2 10.2 



7 7.3 7 4.9 7 5.7 



IV. 



9 15 



„ 13.8 



„ 18.0 



„ 16.8 



9 15.9 

 2 10.2 



Mean of 4 Microscopes 7° 7' 54".58 by 7 Observ 



1828. 



Microscopes. 



II. 



IV. 



1828. 



Microscopes. 



II. 



July 



June 27 

 28 

 3 

 12 

 16 

 17 

 18 

 19 



inches. 

 30.25 



30.222 



29.69 



29.98 



29.83 



29.65 



29.87 



29.95 



57.0 



56.0 



53 



49.3 



57 



63 



59 



53 



7 21 49 



, 48 



, 56 



„ „ 56.3 



, „ 55.0 



, „ 34.0 



p» )) 55 



„ 52.2 



21 48.5 



„ 50.0 



„ 54 



„ 56 



„ 56.5 



„ 53 



„ 54 



„ 52.3 



21 48 



„ 43 



„ 51.7 



„ 51.5 



„ 53.2 



„ 51.3 



„ 49 



„ 47.7 



21 58 

 21*59 



22 2 

 22 3 

 22 7.3 

 22 5.0 

 22 4.0 

 22 3.8 



July 12 

 13 

 15 

 17 

 18 



inches. 

 29.93 



29.91 



30.02 



29.78 



30.00 



37.5 



32 



39 



54.5 



36.5 



353 7 51 

 i> )t 58 

 » >! 53 

 „ „44 



,, ,, 51.8 



/ // 

 7 63 



„ 52.7 



„ 54.0 



„ 47.1 



„ 52.7 



/ // 



7 50.2 



„ 50.0 



„ 49.2 



„ 41.2 



„ 46.2 



7 51.2 

 „ 49.0 

 „ 51.0 

 „ 43.0 

 „ 51.8 



July 15 ... Mean .. 

 Refract, and Redact. 



.353 7 51.3 

 -2 23.6 



7 51.6 

 2 23.6 



7 47.4 

 2 23.6 



7 49.2 

 2 23.6 



July 10 ... Mean .. 

 Refract. — Reduct. 



Superior Culminat. 

 Inferior Culminat.., 



7 21 53.2 

 -39.6 



21 53.04 

 39.63 



21 49.4 

 39.6 



22 2.8 

 39.7 



353 5 27.7 



5 28.0 



5 23.8 



5 25.6 



7 21 13.6 

 353 5 27.7 



21 13.4 

 5 28.0 



21 9.8 

 5 23.8 



21 23.1 

 5 25.6 



Half. Diff. S. P. D. 7 7 52.9 



7 52.7 



7 53.0 



7 58.8 



Mean of 4 Microscopes 7° 7' 54".35 by 13 Observ. 



