Trigonometrical Survey. 54,7 



From Devonshire we proceeded to the eastward, for the pur- 

 pose of carrying on a second series of triangles. These were 

 necessarily intended to originate from the side which connects 

 the station on Beacon Hill, near Amesbury, with that on Win- 

 green Hill, near Shaftesbury. 



In the month of July, the observations were completed at 

 the station on the Mendip Hills, after which the instrument was 

 taken to Bradley Knoll ; Dundry Beacon, near Bristol ; Lans- 

 down and Farley Down ; the station on Lansdown being chosen 

 rather for a secondary than a principal place of observation. 



From Bradley Knoll, to which place the instrument was 

 carried from Farley Down, we proceeded to Westbury Down, 

 and from thence to Beacon Hill, near Amesbury ; because it was 

 necessary that a new point on the range near Marlborough, 

 commonly named St. Ann's Hills, should be observed. The 

 station formerly chosen at the eastern extremity of this range, 

 and observed in 1794, (see Phil. Trans. 1795, p. 471.) was this 

 year found to be useless, as the high land, on the same range, 

 prevented it from being seen at Lansdown : two others were, 

 therefore, selected to the westward of the former, and observed 

 from Beacon Hill ; one for the purpose of connecting with Lans- 

 down, and a station near Symmond's Hall, in Gloucestershire; and 

 the other with Inkpin Beacon. The particular circumstances of 

 this range, both as to situation and height, have thrown great im- 

 pediments in the way of the survey, and are the means of cutting 

 off, in a considerable degree, the connection between the southern 

 triangles and those which have been since carried on in the 

 midland of the kingdom. From Amesbury the party proceeded 

 to Inkpin Beacon, near Hungerford, where the operations 

 terminated. 



