63 57 7 78 21 12 37 41 41 the distance of Stanmore from Wendover which triangle gives feet. In consequence of Bushy Heath intercepting the view towards the east from Stanmore, it became necessary to choose a station on the former. To determine the distance, the angles at the two stations were taken very accurately; they were as follows, Stanmore 42 11 21,5 Bushy Heath 135 35 40,5 To determine the distance of the station on Pen Church Tower, we have two angles in the following triangle, viz. Wendover 38 13 18 Stanmore 1954 Wendover the distance of Pen from which gives 5483,3 feet for the required distance. which, corrected for calculation, becomes, which triangle gives feet. With this distance of Stanmore from Pen, found from the last triangle, and also that between Stanmore and Hanger Hill, derived from the triangle, Bagshot Heath, Hanger Hill, and Stanmore, together with the included angle at Stanmore, viz. 109′ 28′ 22′′,5, we get the distance of Pen to Hanger Hill Tower = 94631,8 feet. The same distance has been found before, in a shorter and more direct way, being 94640,5 feet: the difference is only 8,7 feet; a sufficient proof that the distances given for the survey of this intricate and woody country, are sufficiently correct. It will be more convenient to show how these triangles are connected with those to the eastward, when I arrive at that part of the work which treats of the survey of Essex, than at present. I shall, therefore, proceed to the following article, after observing, that by the help of Harrow Spire, (the situation of which has been determined by General Roy,) and by observations hereafter to be made with the small instrument on Pen Tower, less difficulty will occur in the interior survey than was at first expected. ART. XV. Triangles formed by the intersections of Churches, Windmills, and other Objects. |
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