LONGITUDE OF OBSERVATORY BAY, FINAL RESULT. 421 



"We have, therefore, the three following determinations of the longitude 

 of Observatory Bay, as inferred from the occultation of 9 Tauri : 



h m s 



From the Betsy Cove observation ........ 4. 3g. 32 - o 



Molloy Point ,, ........ 4. 39.64 '76 



Observatory Bay observation ... 4. 3g. 35' 8 



,, 

 , , 



Mean, giving double weight to ] 



> 4. 3o. 33 ' 

 the Betsy Cove result ..... J 



The circumstances of the occultation were very favourable, as the center 

 of the Moon passed within 6' of the star. 



(4.) Longitude of Observatory Bay from the Lunar Observations at Betsy Gove. 



Communicated by Dr. Auwers. 



Mean. Betsy Cove, 

 Observer. Instrument. J) I. 3> II. West of Greenwich. 



3 s h m s 



Applying the difference of longitude as before, we have for the longitude 

 of Observatory Bay from these observations 



4 h . 3g m . 33" 72. 



The corrections applied to the Moon's Tabular Right Ascension were the 

 same as those used in reducing the transit-observations at Observatory Bay. 



We have, therefore, the following results for the longitude of the transit 

 instrument at Observatory Bay : 



h m a 



By the Meridional transits at Observatory Bay (3 observers) ... 4. 3g. 33 2 E. 

 ,, Altazimuth observations ,, (i observer j ... 4.39.33-9 



, , Occultation of 9 Tauri , , (4. observers) ... 4. 3g. 33 6 



, , Meridional and Altazimuth observations at Betsy Cove "| 



. > 4. 3g. 33 "j 

 (2 observers) . . . J 



Adopted 4. 3g. 33*5 



It seems highly improbable that the error of this determination can 

 exceed 2 s . 



G. L. T. 



