30 TRANSIT OF VENUS, 1874. HONOLULU. 



Giving each day the weight 1, and rejecting only October 15, the mean 

 result from the occultations is 10 h . 31 m . 26"-9. 



We have, therefore, the* following determinations of the longitude of 

 Honolulu station : 



h m s 



By the Meridional Transits of the Moon 10. 3i. 26'o W. 



By the Zenith Distances 10. 3i. 2y - 3 



By the Occultations of Stars 10. 3i. 26*9 



67. In the year 1868, M. Fleuriais, at his station in Emma Street, observed 

 19 meridional transits of the Moon's first limb and 8 of the second limb. 

 His observations are published in detail in the additions to the Connaissance 

 des Temps for 1872. The result reduced to APUA Station is 10' 1 . 31 m . 22 8 '25, 

 a determination of great value, M. Fleuriais having had much experience of 

 this description of observation; and, which is equally important, the errors of 

 the lunar tables having been very satisfactorily determined at Washington, 

 Oxford, and Greenwich. It depends, however, upon a single observer. 



In the next section will be found the account of an attempt to connect 

 Honolulu with San Francisco by chronometers, the result giving the longitude 

 of Honolulu 10 h . 31 m . 33 S> 2, which, however, has little value, as explained 

 hereafter. 



Weights being given to the above lunar results according to the number 

 of observers, that is to say, the mean obtained in 1874-5 by transit and 

 altazimuth having the weight 4, and M. Fleuriais' the weight 1, and giving 

 the occultation result the weight 5, the resulting longitude is 



10 h . 31 m . 26 s -3 2 s (say). 



The longitude used for the computation of the tabular quantities required 

 in the final equations representing the observations of the Ingress of Venus 

 is 10 h . 31 m . 27 s- 3 West of Greenwich ; the Greenwich times, therefore, require 

 the correction, 3 t = l s> 0. 



CHRONOMETRIC CONNECTIONS. 



68. It was understood to be an essential part of the programme at Hawaii 

 that the relative longitudes of some of the more distant islands should be 

 determined; and this would have been done, although perhaps not so 

 thoroughly, had the observations of the Transit of Venus failed. 



The stations that were chronometrically connected with the head station 

 at Honolulu (Apua) were the observatories of Professor Forbes at Kailua, 

 Hawaii (Owyhee) and of Mr. R. Johnson at Waimea, Kauai (Atooi), distant 

 150 and 110 nautical miles respectively from Honolulu. 



