Trigonometrical Survey. 



5%9 



Distance from Hensbarrow to Bodmin Down, 47337*2 Feet. Phil. Trans. 1797. p. 460. 



No. of 

 triangles 



II. 



Names of stations. 



Hensbarrow - 

 Bodmin Down 

 Trevose Head 



Observed 

 angles. 



77 20 18,5 

 68 21 58,25 

 34 17 45>S 



180 o 2,25 



Diff. 



0,30 

 —0,32 

 0,23 



Spheri- 

 cal 



Error. 



Angles corrected 

 for calculation. 



Trevose Head from 1 



o,86 +i»39 

 Bodmin Down 



77 20 *7>5 

 68 21 57,25 



34 l 7 4S»*5 



/ 



Hensbarrow 



Distances. 



Feet. 



81967,6 

 78093 



Mean distance from Hensbarrow to Trevose Head, 78096,4 feet. 



in. 



Trevose Head 

 Bodmin Down 

 Cadon Barrow 



42 33 S 2 

 71 55 27 



-0,32 

 -°»43 



42 33 51.25 

 71 55 26,75 

 65 30 42,0 



Cadon Barrow from 



f Trevose Head - 

 \ Bodmin Down 



85625 

 60925 



IV. 



Bodmin Down 

 Cadon Barrow 

 Brown Willy 



3° 58 13 



43 49 5°>5 



-0,05 

 -0,04 



Brown Willy from / ^ mi " Down 

 1 \ Cadon Barrow 



30 58 12,75 



43 49 5° 

 105 11 57,25 





- 



- 



43722 

 32488 



Distance from Carraton Hill to Maker Heights, 82600,3 feet. Phil. Trans. 1797. p. 458. 



v. 



Carraton Hill - - 

 Maker Heights - 

 Black Down - - 



74 5 22.5 



53 4 29 

 52 50 9.75 



—0,60 

 —0,48 

 —0,48 



»>57 



—0,32 



74 5 *i>75 

 53 4 28,75 

 52 50 g,5 



MDCCC, 



180 o 1,25 



4G 



99680 

 82860,4 



