13 



MR. RUMKERS OBSERVATIONS 



3. Southern Solstice, December 1828, observed alternately direct and by Re- 

 flection, with the Repeating Circle. 



Latitude of the Observatory, by Observations direct and by Reflection, of 



Stars made with the Mural Circle. 



Sirius. 



1823. 



Barom. 



Therm. 



Observations, 



Micrometer not corrected. 



II. 



III. 



IV. 



Refrac- 

 tion, 



Feb. 17 



IS 



inches, 

 29.92 

 29.97 



70.2 

 71.0 



direct 

 by reflect. 



Ill 26 16.49 

 256 46 56.5 



27 14.2 

 47 49.4 



26 55.7 

 47 47.5 



Horizon = half Sum 184 6 36.5 



Apparent altitude = half Differ. .. 72 40 20.0 



7 31.8 

 40 17.6 



7 21.6 

 40 25.9 



Mean of the 4 Microscopes 72 40 21.9 



Refraction — 16.3 



True Altitude 72 40 5.6 



True Declination 16 28 60.6 



Latitude 33 48 45.0 



26 38.9 

 47 26.9 



7 2.9 

 40 24.0 



16.3 



