6$q The Account of a 



Art. xix. Latitude and Longitude of Rippin Tor. 



The angle at Blackdown, between the staff at Abbotsbury and 

 the meridian, has been found = joi° 31' i",5, nearly, and that 

 between Rippin Tor and the same staff = 3 8' 52",5 ; there- 

 fore, 98 22' 8" is the angle which Rippin Tor makes with the 

 meridian, and this, taken from 180 , leaves 8i° 37' 52", the 

 bearing of Rippin Tor SW from Black Down. 



This angle, with the distance found above, gives 28585,3 feet, 

 for the distance of Rippin Tor from the meridian of Black Down, 

 and 56086,0 feet, for that from its perpendicular ; therefore, the 

 latitude is 50 33' 5o/',i, and the longitude west from Black 

 Down, i° 13' 3", 8 ; consequently, its longitude west of Green- 

 wich is 3 45' 26"2. 



Direction of the Meridian at Butter ton Hill. 



On the 6th of May, in the afternoon, the angle 

 between the Pole Star, when at its greatest ap- 

 parent elongation from the meridian, and the staff 

 on Hemmerdon Ball was observed, and found 

 to be - - - - 9 1 ° 2 9' 1 3"75 



And on the 7th, in the afternoon - - 97 4 14 



Half their sum is the angle between the meri- 

 dian and the staff on Hemmerdon Ball - 94 16 44 



Again, on the 7th, in the afternoon, the angle 

 between the Pole Star, when at its greatest appa- 

 rent elongation from the meridian, and the staff 

 on Hemmerdon Ball was observed, and found 

 to be - - - - 91 29 12 



Half the sum of this, and the angle observed 



