( 3 ) 



1. ENGLAND AND WALES. 



fc* The Figures in Brackets refer to the Notes subjoined to sack Section. 



GREENWICH, Royal 

 Observatory [1 



London, Cupola of St. 

 Paul's Cathedral 



Kew Observatory , 



Tilbury Fort, Flagstaff 



Gravesend, Cliuich 



Sheerness, Flagstaff 



Harwich, old Lighthouse 

 Orfordness, Lighthouse 

 Lowestoft, Lighthouse... 

 Haisbro' Upper Lighthouse 

 Cromer, Lighthouse. 



Spurn High Lighthouse . 



Flamborough Lighthouse 

 Hartlepool Heugh Light... 

 Sunderland, North Pier 



Lighthouse 



Souter Point, Lighthouse 

 Tynemouth Lighthouse ... 

 North Shields, Lighthouse 

 Blyth, High Lighthouse ... 

 Coquet Island Lighthouse 

 Farn Island, S.W. Lt.-ho 

 Berwick, Lighthouse 



North Foreland, Lightho 



Deal, Time Ball 



South Foreland, High 



Lighthouse 



Dover Castle, the Keep , 

 Folkestone, Lighthouse . 

 New Romney Church ..., 



Lydd Church 



Dungeness, Lighthouse 



Bexhill Church 



Beachy Head, Lighthouse 

 Newhaven, Breakwater 



Lighthouse 



51 28 38 



51 30 49 

 51 28 6 



51 27 7 

 51 26 39 

 51 26 47 



51 56 38 



52 5 

 52 29 12 

 52 49 12 



52 55 27 



53 34 41 



54 6 58 

 54 41 47 



54 55 5 



54 58 15 

 1 5 

 31 

 7 33 



55 20 2 

 55 36 55 

 55 45 53 



51 22 28 

 51 13 20 



55 

 55 

 55 



8 23 

 46 

 41 

 



Brighton Church . 

 Shoreham Church 



Selsea Church 



Chichester Spire .. 



51 



51 7 

 51 4 

 50 59 

 50 57 5 

 50 54 47 

 50 50 45 

 50 44 15 



60 46 35 



50 49 32 

 50 50 

 50 45 19 

 50 50 







Long 







w. 



5 48 

 18 46 

 Long. E. 

 22 42 

 22 10 



44 50 



1 17 25 

 34 34 

 45 28 

 32 20 

 19 6 



7 11 

 Long. W. 



4 51 



1 10 27 



1 

 1 

 1 

 1 

 



21 30 

 21 30 

 24 52 

 26 10 



1 29 50 



1 

 1 

 1 



32 17 

 39 15 



58 57 



Long. E. 



1 26 48 



1 24 20 



1 22 22 

 1 19 23 

 1 11 33 

 56 40 

 54 29 

 58 18 

 28 48 



18 



16 50 



16 



16 15 



The Astronomers Royal. 



The Grand Trigonometri- 

 cal or Ordnance Survey, 

 one of the great works of 

 which our country ought to 

 feel proud, was commenced in 

 1783, with a view to ascertain 

 the difference of longitude 

 between the Observatories of 

 Paris and Greenwich, under 

 General Roy. The principal 

 triangulation was gradually 

 extended under the successive 

 directions of Colonel Williams, 

 General Mudge, Gen. Colby, 

 Colonel Hall, and Colonel Sir 

 Henry James. It was com- 

 pleted and the account of it 

 published in 1858. The bases 

 upon which it is constructed 

 were measured on Salisbury 

 Plain, and upon the shore of 

 Lough Foyle, Ireland, that at 

 the former being 36,577-8581 

 feet, or a little under 7 miles, 

 and that at Lough Foyle being 

 41,640-8873 feet, or a httle 

 under 8 miles. The refine- 

 ment attained may be judged 

 of when it is stated, that the 

 difference between the calcu- 

 lated and measured lengths 

 of these bases was less than 

 2^ inches. The mean length 

 of the sides of the great trian- 

 gles is 35-4 miles, of which 11 

 exceed 100 miles in length ; 

 the longest is 111 miles, i.e. 

 from Slieve Donard in Ireland, 

 county Down, to Sea Fell, 

 Cumberland. 



