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 Dublin. N.B.-Longitude in arc, indicated by the signs • !" (degrees, minutes, and seconds) is converted into longitude in time by reckoning 360° = 24 h., 15° 1 h., and 1° 4 m. 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. At London, or in lat. 51° 30', as by Table, page 25. 3 44 Longitude in time ........... ............ 8 3 52 add 22 Railway or Greenwich mean time........ 4 14 The places which follow the different parallels are situate within 15 miles of latitude, either north or south of it. Lat. GREAT BRITAIN. 58° 0'-Dornoch, Tain, Dunrobin, Portenleik, Dunclaim. 57° 30'-Peterhead, Fraserburg, Banff, Elgin, Cromarty, Inverness, Applecross. 57° 0'-Aberdeen, Bervie, Braemar, Laggan, Corpach. 56° 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 0'-Newcastle, Morpeth, Carlisle, Annan, Dumfries, New Galloway, Wigton. 54° 30'-Scarborough, Whitby, Hartlepool, Stockton, Richmond, Appleby, Cockermouth, Whitehaven, North part of Isle of Man. 540 0'-New Malton, York, Aldborough, Clitheroe, Lancaster, Preston. 53° 30'-Grimsby, Kingston-upon-Hull, Pontefract, Manchester, Wigan, Liverpool, Beaumaris, Holyhead. 53° 0'-Lynn Regis, Boston, Lincoln, Nottingham, Derby, Stafford, Flint, Chester, Denbigh, Caernarvon, Harlech. 520 30-Yarmouth, Norwich, Thetford, Ely, Peterborough, Leicester, Coventry, Lichfield, Shrewsbury, Ludlow, Montgomery, Aberystwith. 520 0'-Ipswich, Colchester, Cambridge, Hertford, Bedford, Buckingham, Oxford, Gloucester, Worcester, Hereford, Monmouth, Brecon, Caermarthen, Car. digan, St. David's. 51° 30'-LONDON, Ramsgate, Canterbury, Rochester, Chelmsford, Windsor, Wallingford, Marlborough, Malmesbury, Bath, Bristol, Newport, Cardiff, Llandaff, Pembroke. 51° 0'-Dover, Winchelsea, Brighton, Guildford, Chichester, Winchester, Portsmouth, Southampton, Salisbury, Shaftesbury, Wells, Ilchester, Taunton, Bridgewater, Minehead, Barnstaple. 50° 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, Downpatrick, Armagh, Charlemont, Dungannon, Augher, Donegal, Ballyshannon, Enniskillen, Sligo. 54° 0'-Carlingford, Newry, Dundalk, Drogheda, Kells, Cavan, Belturbet, Carrick, Boyle, Castlebar, Killala. 53° 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 0'-Waterford, Dungarvon, Youghal, Tallow, Lismore, Rathcormack, Cork, Mallow, Killarney, Tralee, Ardfert, Dingle. 51° 30'-Kinsale, Bandon, Clonakilty, Baltimore. HIGH WATER. The following List, showing the difference of Time, nearly, between London and the Outports 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. add 0 7 sub. 3 Cork Harbour (Queenstown).. add 2 54 Peel Harbour, Isle of Man - 1 47 2 59 Cowes, West sub. 3 22 Crinan.. add 2 42 Pembroke Dock-Yard.. Portsmouth Harbour Ramsay Harbour, Isle of Man Scilly Islands.. Shannon Mouth 2 55 2 57 Sligo Bay 3 53 add 0 24 Southampton.. .......... ........ Southend and Sheerness Spurn Point, the Dundee Dunkerque sub. 1 59 add 4 5 3 2 47 add 2 4 2 35 1 2 23 .3 11 sub. 3 37 1 30 add 3 13 -2 37 -3 58 sub. 5 7 add 1 Flushing (Walcheren). Folkestone.. Fort George Galway Glenluce Bay Gravelines Greenock .... Guernsey Pier 3 21 Texel Road 15 Hartlepool... Whitby Hastings... sub. 3 14 Wigton Bay Wranger Oog 2 6 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 8h. 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 5h. 15m. in the morning. |