1840.] 



Fort William, and Futtehghur. 



83 





Date. 



Set. 



Im. or Em. 



Madras time. 



Futtehghur time. 



Difference. 



1824 



1825 

 1825 



Dec. 21 

 9 



1 



1 

 1 



Immersion 

 Do. 



Do. 



Do. 



Do. 



h. m. s. 

 11 36 41 7 



13 29 57 -8 



17 16 46 -7 



10 00 35 -6 



8 15 28 -6 



h. m. s. 

 11 33 56 



13 27 03 

 17 13 32 

 9 57 17 

 8 13 13 



■3 



•8 



■8 

 -3 

 ■0 



m. s. 

 2 44 -8 



2 54 -9 



3 13 -4 

 3 18 -2 

 2 15 -6 



Jan. 10 

 26 











5 Immersions 



Mean 



2 53 -3 



1825 



Mar. 22 



1 

 1 

 1 

 1 



1 



Emersion. 

 Do. 

 Do. 

 Do. 

 Do. 



h. m. s. 

 7 17 05 -7 



9 11 32 -5 



11 06 23 -0 



9 25 07 -4 



11 20 15 6 



h. m. s. 

 7 14 42, 



9 09 20 

 11 04 19 



9 22 59 

 11 18 03 



•o 

 •o 



•o 

 ■o 

 •o 



2 23 -7 

 2 12 5 

 2 04 -0 

 2 08 -4 

 2 12 6 







April 5 



21 



28 











5 Emersions. 



Mean. 



2 12 2 



Mean of Immersions and Emersions. 

 Madras Observatory 



Futtehghur 



2 32 -7 

 5 21 2 '9 



The above were all taken with Troughton^s 46-inch telescope, 

 power 64, and by myself, except one immersion on the 9th 

 December, which was observed by Mr. William Rix James, one 

 of my best sub-assistants. At the same time observations were 

 taken by several young men, apprentices in the Revenue Survey 

 Department, in my presence ; but I did not allow of any com- 

 munication between them, — each gave to me, on the spot, sepa- 

 rately and silently, the time at which he noted the phenomenon. 

 The following are the differences given by numerous immer- 

 sions and emersions of 1st satellite. m. s. 



Dollond 5 s 64-inch telescope, power 100 . . 2 28 *7 

 TroughWs 46 Do. Do. power 64 . . 2 29 -2 

 Dollond's 45 Do. Do. . . 7b . . 2 32 -4 



Mean, 



.. 2 30 



h. 



1 



Madras Observatory, . . 



5 21 2 



•9 



Futtehghur, Do 



5 18 32 



•8 



