Names of stations. Danbury Hatfield Broad Oak Steeple Danbury Thaxted Spire Hatfield Broad Oak Pleshley Beauchamp Roding Spire Danbury Stoke O 12 Stoke 1 4 30 152 53 10 25 45 6 54 20 51 Hatfield Broad Oak Thaxted 27 24 19 118 2 28 Beauchamp Roding Distances. The angle observed from the station on Danbury Steeple, between Hatfield Broad Oak and Thaxted, was 30° 33′ 40′′; this, with the including sides, 85094 and 101330 feet, gives the following triangle: Danbury 57 2 20, which gives the distance between Thaxted and Hatfield Broad Oak = 51566 feet. Stoke i distance from Thaxted Spire to Lavenham Steeple. Again, the angle observed at Danbury, between Thaxted and Stoke was 66° 43′ 8′′; this, with the sides which form it, Danbury and Thaxted, Danbury and Stoke, gives the following triangle: Danbury Stoke 122630 63951 66° 43′ 8′′ 64 51 36, from which we find 124430 feet, for the dis Thaxted tance from Thaxted to Stoke. The angle at Lavenham Steeple, between Stoke and Thaxted, was likewise observed, and found to be 89° 10′ 30′′, which, with the distances of these latter stations from Lavenham, 48039 and 124430 feet, gives Lavenham 89° 10′ 30′′ 68 7 O 22 42 30, from which we find 115480 feet to be the The angle at Danbury, between Southweald and Hatfield Broad Oak, was found to be 54° 44′ 30′′. The distances from Danbury to Southweald and Hatfield Broad Oak have been already found, the former being 77622 feet, and the latter 85096 feet; from these we get the triangle, 54° 44′ 30′′ Hatfield Broad Oak 57 33 25, which gives 75104 feet, for the distance between Hatfield Broad Oak and Southweald Steeples. In order to connect the preceding triangles with those carried on for the survey of the south-western part of Essex, and of Hertfordshire, stations were selected on Hampstead Heath, and on Highbeech in Epping Forest, to which the great theodolite was taken, as related in the article detailing the particulars of the operations in 1799. The triangles making this connection are the following. The first, namely, 28° 58′ 10′′ 94 49 5 Langdon Hill 56 12 45, is had from the included angle at Severndroog Tower, 28° 58′ 10′′, and the sides Severndroog Tower and Southweald, Severndroog Tower and Langdon Hill: the first is 73787 feet, and the second 88470 feet. From these data, we obtain the distance between the station on Langdon Hill and that on Southweald Steeple 43001 feet. Severndroog Tower Names of Stations. Severndroog Tower Brentwood Danbury Severndroog Tower Severndroog Tower St. Paul's Severndroog Tower Highbeech 33 53 4 Foot of the cross on the dome of St. Paul's from the station on Severndroog Tower 39962*. Phil. Trans. for 1787. p. 250. 44 34 28 U Highbeech Southweald Feet. 78553* 36616 78553* 7706 71534 61919 73795* 55156 From the last triangle, we find the distance from Severndroog Tower to the station on Southweald Steeple to be 73795 feet; this, it will be perceived, is deduced from the distance between the cross on the deme of St. Paul's and Severndroog Tower; but 73791 feet has been found by the triangle, which is derived from the distance between the latter station and Wrotham. A difference of 4 feet on such a distance, all things considered, is not a large quantity. Names of Stations. Severndroog Tower Brentwood Spire Severndroog Tower Hampstead Heath Highbeech St. Paul's Highbeech, new station Observed O " " 49 8 1 71 16 44 Severndroog Tower Stand of Epping Windmill 51 24 12 58 29 19 St. Paul's to the new station 61738 feet. 24 36 5 Highbeech, old station 105 21 44 Distances. Brentwood As it became necessary to ascertain the situation of a high building near Berkhamstead, which, for distinction sake, I shall style the Gazebo, the instrument was removed from the station on Highbeech, to another farther west of it, as some trees obstructed the view of this object from the former. To get the distance from St. Paul's to this new station, the distance between it and the old one was measured, and found = 460 feet: the angles in the following triangle were also observed. Hampstead Heath 844 10 122 10 45 St. Paul's Gazebo 16 46 15 Epping Windmill 52 16 Epping Windmill 64855 59455 61919 25966 which gives the distance from 49631 88872 46717 17042 81891 17043 Names of Stations. Highbeech, old station Hatfield Broad Oak Steeple Berkhamstead Gazebo Hatfield Broad Oak Henham on the Mount Henham on the Mount At the new station on Highbeech, the angle between the staff on the Gazebo at Berkhamstead and the old station was observed, and found to be 141° 45′ 50′′. This angle, with the measured distance between the stations, and also the distance from the Gazebo to the new station, which are respectively 460 and 49628 feet, gives 49987 feet, for the distance between the new station on Highbeech and Berkhamstead Gazebo. Hatfield Broad Oak Henham on the Mount Rickling Steeple Observed Henham on the Mount Elmdon Steeple 1 "1 99 19 16 Epping Windmill 71 28 54 Thorley 20 54 0 146 35 O Hatfield Broad Oak Distances. Henham on the Mount Atterbury Rickling Elmdon The angle between Albury and Elmdon Steeples was observed, at Henham on the Mount, and found to be 72° 47′ 38". The distances from the former stations to the latter are 37882 and 45275 feet, which give the following triangle: 72° 47' 38" Henham 60 28 27 Elmdon 46 43 35, from whence we get the distance Names of Stations. between Albury and Elmdon 49701 feet. Henham on the Mount Thaxted Steeple Elmdon Thaxted Balsbam Steeple Elmdon Balsham Babraham Mount Station Hatfield Broad Oak Severndroog Tower Langdon Hill Gravesend Hornchurch Steeple Observed O " "I 106 30 50 23 240 71 54 10 23 38 46 29 46 30 Henham Hatfield Broad Oak the distance of Thaxted from Hatfield Broad Oak. 51 9 50 21 6 9 77 57 33 50 59 0 } Thaxted Elmdon Babraham Mount Triplow Steeple The angle at Henham on the Mount, between Hatfield Broad Oak and Thaxted Steeples, is 109° 10′ 44′′; and the distances of the latter stations from the former one are 39266 and 22988 feet; from these data we have the triangle, ❤ Balsham Babraham Mount Triplow High Easter Hornchurch Hornchurch Feet. 22988 56302 55262 65504 109° 10′ 44′′ 45 56 29 24 52 47, which gives 51608 feet for {43559 23251 24806 29185 24858 21460 50989 44832* 44837* 56438 |
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