598 



The Account of a 



No. of 



triangles. 



XXX. 



Names of stations. 



White Horse Hill 

 Highclere - 

 Nuffield - 



Observed 

 angles. 







63 



/ 



7 



53.25 



-0,94 



63 



18 



16,75 



-0,94 



53 



33 



49-5 



_o,86 



Diff. 



Spheri- 

 cal 



l 79 59 59.5 

 White Horse Hill from 



2,74 



Error. 



■3.24 



Angles corrected 

 for calculation. 



63 7 53.5 



63 18 17 



6 3 33 49«S 



f Nuffield 

 1 Highclere 



Distances. 



Feet. 



120557,7 

 108563,1 



Distance from Eeacon Hill to Highclere, 98694,4 feet. Phil. Trans. 1795. p. 497. 



XXXI. 



Beacon Hill - - 

 Highclere 

 Inkpin Hill - - 



17 42 38,5 

 56 29,75 



—0,12 

 -f-0,08 



-0,47 







06 16 53,25 







80 1,5 





0,50 



+ 1,0 



17 42 38,25 



56 o 29,25 

 106 16 52,5 



Inkpin Hill from 1 B ? it 

 t |_ Beacon H: 



Hill 



31278,8 

 85247,9 



XXXII. 



Highclere - 

 Inkpin Hill 

 White Horse Hill 



34 27 5°>75 

 133 2 7 57>5 

 12 4 11,5 



+0,38 

 — 0,91 

 + 0.04 







'79 59 59>75 





0,49 



— 1,24 



34 27 5°.75 

 133 27 5 8 

 12 4 11,25 



White Horse Hill from / Highclere 

 [_ Inkpin 



108565,5 

 84647,1 



In the following computations, I shall use 120557,7 feet for the dis- 

 tance between White Horse Hill and Nuffield : this is derived from 

 the base on Hounslow Heath. By the last triangle, White Horse Hill, 

 from Highclere, is distant 108565,5 feet ; which is computed from 

 the base on Salisbury Plain. The distance between those stations, 

 found by the second of the above triangles, is 108563,1 feet. There- 

 fore, whether the distance between White Horse Hill and Nuffield 

 be founded on the base measured on Salisbury Plain, or Hounslow 

 Heath, nearly the same conclusion is derived: the difference will 



