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whose longitude is west of Greenwich, to the time of sunrise or sunset add the longitude in time, and to places whose longitude is east of Greenwich, subtract the longitude in time, the result will be the railway or Greenwich time that the sun rises or sets. The same rule is applicable to places in Ireland whose longitude is east or west of Dubiin.

N.B.--Longitude in arc, indicated by the signs !" (degrees, minutes, and seconds) is converted into longitude in time by reckoning 360° = 24 h., 15o=1h., and 1° =im.

Example :- On June 21st at Penzance, in latitude 50° 7' N. and longitude 5° 31' W., what will be the railway time that the sun rises and sets ?

Sun rises. Sun sets.

h. m.
At London, or in lat. 51° 30', as by Table, page

25
.. 3 44

8 18
Cor. by Aux. Table, page 4, for lat. 50° 10' add

sub. 8 Mean time at Penzance

52

10 Longitude in time ...

add 22 add Railway or Greenwich mean time........ 4 14

8 32

h. m.

8

3

8

22

The places which follow the different parallels are situate within 15 miles of latitude, either north or south of it. Lat.

GREAT BRITAIN. 580 0'-Dornoch, Tain, Dunrobin, Portenleik, Dunclaim. 570 30'—Peterhead, Fraserburg, Banff, Elgin, Cromarty, Inverness, Applecross. 570 0'-Aberdeen, Bervie, Braemar, Laggan, Corpach. 560 30'-Forfar, Dundee, Perth, Comrie, Ardchattan. 560 0'_Berwick, Haddington, Edinburgh, Linlithgow, Kinross, Stirling, Dumbarton,

Glasgow. 55° 30'-Embleton, Jedburgh, Selkirk, Sanquhar, Lanark, Irvine, Ayr. 550 O'_Newcastle, Morpeth, Carlisle, Annan, Dumfries, New Galloway, Wigton. 540 30'—Scarborough, Whitby, Hartlepool, Stockton, Richmond, Appleby, Cocker.

mouth, Whitehaven, North part of Isle of Man. 540 O-New Malton, York, Aldborough, Clitheroe, Lancaster, Preston. 53° 30' --Grimsby, Kingston-upon-Hull, Pontefract, Manchester, Wigan, Liverpool,

Beaumaris, Holyhead. 530 0'-Lynn Regis, Boston, Lincoln, Nottingham, Derby, Stafford, Flint, Chester,

Denbigh, Caernarvon, Harlech. 520 30' -Yarmouth, Norwich, Thetford, Ely, Peterborough, Leicester, Coventry, Lich

field, Shrewsbury, Ludlow, Montgomery, Aberystwith. 520 0'-Ipswich, Colchester, Cambridge, Hertford, Bedford, Buckingham, Oxford,

Gloucester, Worcester, Hereford, Monmouth, Brecon, Caermarthen, Car.

digan, St. David's. 510 30'_LONDON, Ramsgate, Canterbury, Rochester, Chelmsford, Windsor, Walling.

ford, Marlborough, Malmesbury, Bath, Bristol, Newport, Cardiff, Llandatt,

Pembroke. 51° 0'Dover, Winchelsea, Brighton, Guildford, Chichester, Winchester, Portsmouth,

Southampton, Salisbury, Shaftesbury, Wells, Ilchester, Taunton, Bridge

water, Minehead, Barnstaple. 500 30'—Newport (L. W.), Poole, Weymouth, Exeter, Ashburton, Totnes, Plymouth,

Tavistock, Launceston, Bodmin, Camelford, Padstow. 500 10'—Truro, Falmouth, Helston, Penzance.

IRELAND. 550 0-Carrickfergus, Antrim, Coleraine, Londonderry, Lifford, St. Johnstown. 540 30'-_Belfast, Killyleagh, Downipatrick, Armagh, Charlemont, Dungaunon, Augher,

Donegal, Ballyshannon, Enniskillen, Sligo. 540 O'-Carlingford, Newry, Dundalk, Drogheda, Kells, Cavan, Belturbet, Carrick,

Boyle, Castlebar, Killala. 530 30'—Dublin, Swords, Naas, Athboy, Mullingar, Philipstown, Kilbeggan, Athlone,

Roscommon, Lanesboro', Tulsk, Tuam, Ballinrobe. 530 0'— Wicklow, Blessington, Baltinglass, Carlow, Athy, Kildare, Portarlington,

Maryborough, Ballinakill, Banagher, Galway, Ennis. 520 30'_Newborough, Enniscorthy, Wexford, Kilkenny, Cullen, Clonmel, Cashel,

Killmallock, Limerick, Askeaton. 520 '-Waterford, Dungarvon, Youghal, Tallow, Lismore, Rathcormack, Cork,

Mallow, Killarney, Tralee, Ardfert, Dingle. 51° 30'-Kinşale, Bandon, Clonakilty, Baltimore.

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Lat.

580 0

570 30'
570 0
560 30'

m m m
40 38 32
37 35 30
34 32 27
31 29 25
28 26 22

560 0'

55° 30'

25 23 20

22 20 17

550 0
54° 30'

19 17 15

540 0

16 14 12

13 11 10

530 30'
530 0'

10 9 7

520 30

6 6 5

5200

3 3 3

51° 30'

N.B. The

510 0

3 3 3

5030' 500 10

6 6 5 8 7 6

1 2 2 1 2 3

3 4 5 4 5 6

5

4

3

2 1

0

4 5

6

7 8

8

8 7 6

1 2 3

7 8 8

51° 30' to 50° 10' subtract

from time of Sun-rising. Add to time of Sun-setting.

Add to time of Sun-rising.
Subtract from time of Sun-setting.

Subtract from time of Sun

rising. Add to time of Sup-setting. ...... adulu

sub. 3

24

-3

HIGH WATER.
The following List, showing the difference of Time, nearly, between London and the Out-

ports of the United Kingdom, as well as a few foreign Ports, is derived from Local
Tide Tables and the best books on Navigation.
h. m.

h, m. Aberdeen sub. 0 54 Hellevoetsluis

7 Alderney Pier add 4 39 Holyhead Harbour

41 Antwerp. 2 18 Horn Point

0 22 Ardrishaig sub. 2 7 Hull

add 4 22 Ayr Harbour. 1 57 Hythe ..

sub. 3 21 Bantry Bay (Castletown). add 2 7 Ifracombe..

add 3 35 Barnstaple Bar .. 4 23 Jersey (St. Aubyn)

4 14 Beachy Head.... sub. 3 7 King's Road

42 Belfast 3 Kingstown Harbour..

sub. 2 57 Berwick add o 11 Kinsale Harbour

add 2 36 Blakeney Harbour

-4

23
Leith ....

0 10 Boulogne sub. 2 42 Lerwick Harbour..

sub. 4 22 Brest Harbour add 1 40 Little Hampton

2 21 Brielle.. -0 53 Liverpool

2 44 Brighton..

sub. 2 45 Lough Foyle (Londonderry) add 5 52 Bristol.. add 5 8 Margate

sub. 1 55 Buchan-ness

sub. 2 7 Milford Haven, entrance to add 3 39 Calais 2 18 Montrose

sub. 0 2 Campbelton 2 22 Morlaix Road

add 2

46 Cape Clear.. add 1 54 Mount's Bay

2 20 Cardigan Bar 4 38 Newhaven

sub. 2 16 Carmarthen Bay 3 52 Newport (Isle of Wight)

3 10 Cherbourg

5
42 New Shoreham Harbour

2 33 Chichester Harbour

sub. 2 22
Orfordness ..........

7 Christchurch Harbour....... -5 7 Ostend

-147 Cork Harbour (Queenstown).. add 2 54 Peel Harbour, Isle of Man

2 59 Cowes, West ...... sub. 3 22 Pembroke Dock-Yard.. add 4

5 Crinan...

Port Glasgow

sub. 1 49 Cromarty sub. 2 12 Port Patrick

-2 57 Cuxhaven 1 23 Portsmouth Harbour

2 26 Dartmouth Harbour

add 4 3 Ramsay Harbour, Isle of Man - 2 55 Devonport Dock-Yard 3 36 Ramsgate Harbour

2 26 Dieppe sub. 3 1 Rye Bay..

2 47 Donegal Bar add 2 58 Scarborough

add 2 4 Douglas Harbour, Isle of Man sub. 2 55 Scilly Islands.

2 35 Dover Harbour 2 55 Shannon Mouth

2 23 Dublin 2 57 Sligo Bay

3 11 Duncansby Head - 3 53 Southampton..

sub, 3 37 Dundee add o 24 Southend and Sheerness

1 30 Dunkerque sub. ) 59 Spurn Point, the

add 3 13 Exmouth Bar add 4 13 St. Ives

2 37 Eyder, Mouth of the sub. 2 26 St. Malo

3 58 Eyemouth

add o
8 Stromness

sub. 5 7 Falmouth Harbour 3 23 Sunderland.

add 1 15 Flushing (Walcheren). sub. 1 7 Tay Bar ..

sub. 0 1 Folkestone.. 3 21 Texel Road

add 4 38 Fort George 2 6 Torbay

3 53 Galway add 2 28 Tynemouth Bar

0 43 Glenluce Bay sub. 3 26 Waterford, Hook Point of..

3 4 Gravelines .. 2 22 Wells Harbour .......

3 54 Greenock

1 59 West Scheldt, entrance sub. 1 31 Guernsey Pier add 4 23 Weymouth.

add 4 23 Hartlepool. 1 21 Whitby

1 38 Hastings.... sub, 3 14 Wigton Bay

sub. 3 7 Havre de Grace 16 Wranger Oog

2 6 Heligoland... 2 34 Yarmouth Road

4

57

...... add 2 42

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To find the time of High Water at the above Places, it will be necessary to add or subtract the numbers in the above Table, according to the directions here given, to or from the time of High Water at London, as given in the Calendar for the day required. For example:-On the 10th of January, the morning High Water at London Bridge

is sh. 10m.; the High Water at Dover Harbour is 2h. 55m, earlier; subtract, according to the direction, 2h. 55m. from 8h. 10m., and the time of High Water at Dover Harbour on that day will be found to be at Sh. 15m. in the morning.

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