18 



PRIME RICERCHE 



16 Novembre 1892. 



B URSAE 3IINORIS 



Posizione 



del 

 Cerchio 



Tempio medio 

 osservato 



Zenitale apparente 



Rifrazione 



Zenitale vera 

 osservata 



Zenitale calcolata 



Differenza 



D 



h in ,, 

 10.01.58,0 



66. 44. 47, 5 



r 1 1 



2. 12, 9 



66° 47.' 00,' 4 



66. 47.'00','0 



+ 0,' 4 



D 



04. 8,0 



46. 43, 6 



13, 2 



48. 56, 8 



49. 01, 



— 4, 2 



D 



07. 34, 



49. 48, 



13, 6 



52. 01, 6 



52. 04, 7 



3, 1 



D 



09.13,0 



51. 15, 6 



13, 7 



53. 29, 3 



53. 29, 4 



0, 1 



D 



10.58,0 



52. 39, 



13, 9 



54. 52, 9 



54. 56, 5 



3, 6 



D 



13.08,0 



54. 26, 6 



14, 1 



56. 40, 7 



56. 41, 6 



0, 9 



D 



15.21,0 



56. 08, 2 



14, 2 



58. 22, 4 



58. 23, 8 



1, 4 



D 



17.36,0 



57. 48, 9 



14, 4 



67. 00. 03, 3 



67. 00. 02, 8 



+ 0, 5 



D 



19. 40, 



59. 13, 



14, 6 



01. 27, 6 



01. 30, 



— 2 , 4 



D 



21.18,0 



67. 00. 19, 6 



14, 7 



02. 34, 3 



02. 37, 



2, 7 



D 



23. 19, 



01. 39, 1 



14, 8 



03. 53, 9 



03. 55, 3 



1, 4 



S 



39. 28, 



09. 59, 9 



15, 7 



12. 15, 6 



12. 16, 6 



1, 



s 



41.30,0 



10. 46, 9 



15, 8 



13. 02, 7 



13. 03, 6 



0, 9 



s 



43. 32, 



11. 29, 5 



15, 9 



13. 45, i 



13. 46, 4 



1, 



s 



45. 03, 



12. 02, 1 



16, 



14. 18, 1 



14. 16, 2 



+ 1, 9 



s 



46. 54, 



12. 31, 8 



16, 



14. 47, 8 



14. 49, 4 



- 1, 6 



s 



48.21,0 



12. 56, 9 



16, 1 



15. 13, 



lo. 13, 6 



0, 6 



s 



49. 43, 



13. 18, 6 



16, 1 



15. 34, 7 



15. 34, 4 



+ 0, 3 



s 



51. 18,0 



13. 41, 7 



16, 1 



15, 57, 8 



lo. 56, 6 



1, 2 



s 



52. 47, 



14. 00, 2 



16, 2 



16, 16, 4 



16. 15, 8 



0, 6 



s 



54. 49, 



14. 22, 



16, 2 



16, 38, 2 



16. 38, 



0, 2 



s 



56. 55, 



14. 41, 6 



16, 3 



16, 57, '9 



16. 57, 5 



0, 4 



Media delle differenze = — 0", 88 



Si ha dunque che le differenze inedie fra le zenitali osservate e le 

 calcolate sono : 



da x Urs. maj. ^z — -\- 0", 59 da a Urs. min. A z - — 0", 88 



Media complessiva = — 0", 15 



