512 



PHILOSOPHICAL TRANSACTIONS. 



[anno 1779- 



1772, July 11 

 Aug, 26" 

 Sept. 27 

 Oct. 13 



1773, Aug. 31 



1774, Sept. 10 



Dec. 29 



1775, Feb, 22 

 Aug. 7 



Oct. 22 



Apparent time. 



22"^ ~3' 



4 22 



17 

 51 



43 



4 



57 



Im. 

 Em. 

 Em. 

 Em. 

 Im. 



Im 



Em. Ill 3 48 



Em. I 7 49 37 



Im. 14 53 55 



Im. 17 37 1 



15 28 31 



Tele- 

 scope. 



Fert. 



6" 



3h 

 3h 

 6' 



Hence the times of the Nautical Ahnanac corrected, and redticed to the effect 

 of a S-i- feet telescope, and compared with the observations made at Cork, to 

 find the difference of meridians of Greenwich and Cork, are as follow : 



Hence the difference of meridians of Greenwich and Cork is SS'" 57^ of time, 

 and the longitude of Cork is 8° 29' 15* west of Greenwich. The latitude of 

 Cork, as determined by Dr. Longfield, by a mean from two quadrants, is 

 51" 33' 54" north. By Mr. Newenham's observations, compared in like manner, 

 the difference of meridians of Greenwich and his observatory is 34™ 1 1% which, 

 according to Dr. Longfield's observations, allowing 8' for the diff^erence of me- 

 ridians, owing to the distance of the two observatories, should be 33"" 49% 

 which latter result is most to be depended on. The latitude of Mr. Newen- 

 ham's observatory being 18" greater than that of Dr. Longfield's, according to 

 the measured distance, is 51° 54' 12" north. 



XVII. The Latitude of Madras in the East Indies, deduced from Observations 



made by IVilliam Stevens, Chief Engineer, p. 182. 



The observations were taken with an astronomical brass quadrant, on the top 



of the house usually inhabited by the chief engineer ; and the mean latitude is 



13° 4' 54" north. - 



