1840.] 



Fort William, and Futtehghur. 



70 



" compared with those tables, I shall take the liberty of selecting 

 "those which appear to me to have been taken by the same 

 " person, and with the same telescope. The longitude of the 

 " Surveyor-GeneraPs Office at Calcutta, from comparison of obser- 

 " vations, made of Jupiter's 1st satellite, with De LanuWs tables. 



Date. 





Emersions. 



Date. 





Immersions. 



1821 



Nov. 22 

 Dec. 8 

 Jan. 7 

 16 

 Nov. 27 

 Dec. 13 



Mean 



h. m. s. 

 5 53 16 

 123 

 85 



5-7 



102 

 5 52 561 



1822 



Oct. 10 



Oct. 24 



26 



31 



Nov. 18 



h. m. s. 

 5 53 64 

 5 52 55 4 



1822 





5 53 120 





65 







10 









5 53 4 26 





5 53 573 

 5 53 426 













5 53 500 





"The mean is about twelve seconds of time less than you 

 " make it by the Nautical Almanac, yet the accordance between 

 "the means of the emersions and immersions, is truly sur- 

 " prising." These observations, with particulars of the transit 

 of Mercury, Mr. Fallows sent to the Admiralty. Though the 

 result deduced by him is not from corresponding sights, yet the 

 corrections made by so skilful an astronomer, and his opinion 

 of their value, may be thought to render them worthy of some 

 notice. In 1821 and 1822 the Surveyor GeneraFs Office was 

 at No. 8, Russell Street, Chowringhee. The reduction to the 

 Fort Flag-Staff is four seconds of time, it will therefore, by 

 these observations, be in 5h. 53m. 3s. 1 = 88° 15' 15". 



If the above eclipses were in sufficient number to entitle them 

 to a place on the mean, it would give for the Madras Obser- 

 vatory, 5h. 20m. 59s*34. 



Another mode by which I endeavoured to find the meridian 

 of Fort William, was by the transits of the moon's limbs 

 over the meridian, compared with those of stars differing little 

 from her in right ascension and declination ; for this purpose, 



