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GoTTENBuno Lights.

Hydroqraphk Office, Admiralty, Oct. 2CM, 1811. The Board of Admiralty at Stockholm has given notice that—

1. A light on the island of Wingii will he exhibited on the 1st of November next, and will be continued every night throughout the year.

2. The lights on the islands Buskar and Botto will also be shown on the 1st of November next, but they will continue only between the 15th of August and the I5lh of April, every year.

Liout Oh Isle P»«stoe, Norway.

Hydrographic Office, Admiralty, Oct. 26th, 1841.

The Board of Admiralty of Stockholm has given notice that, a fixed light has been established on the island of Prcestoe, in the Gulf of Folden, (Province of Drontheim) situated in latitude C4" 47' 26" north, and longitude 11s 8' east.

The light is elevated thirty-three feet above the level of the sea, and is visible at the distance of ten miles.

It will be lighted every night between the 15th of August and the 30th of April.

Vessels bound to Naeroe Sound, .on leaving the Gulf of Folden, are to observe that the strongest glare of light is seen when it bears E.N.E. easterly, and that by steering for the light on this bearing they will avoid the dangers on each side of the channel to the south-west of Prasstoe: and they are cautioned not to stand so far to the eastward as to'lose sight of the light. As soon as they arrive at a quarter of a league from Prajstoe, they should steer N.N.E. till it bea;-8 east, when a north-east course will carry them up to Naeroe Sound.

N.B. The above bearings are magnetic, the variation being 20u west.

Buoys On Tub India Bank, Arklow, And Glassoorman Banks, East Coast

of Ireland.

Ballast Office, Dublin, Oct. 14th, 1841.

The Corporation for Preserving and Improving the Port of Dublin, hereby give notice that a buoy has been placed at the south end of the India Grounds Bank, and that a beacon has been attached to the buoy at the north end of the Arklow Bank.

Specification given of the position and appearance of the buoys, by Mr. Halpin, the Inspector of Light house*.

The buoy at the south end of the India Grounds Bank, is of black colour, having the words " India Grounds South," painted in white letters on its broad end; the buoy is moored in live fathoms at low water.

The buoy at the north end of the Arklow Bank is of black colour, with white zones or belts round its sides, the broad end painted black, having the words "Arklow Bank North," in white letters. A beacon of a corneal form, coloured white, and borne on a triangular stand, has been affixed to the top of the buoy. It is moored in five fathoms at low water.

VVicklow head bearing . . N. J W.
Mizen head '• . . West

The Wicklow head lights kept in line lead between the India Grounds Bank and the Arklow Bank.

It is intended to place two beacons on the outer edge of the Arklow Bank, of which due notice will be given; its southern extremity is at present marked by the Arklow Bank Flouting Light.

Westward of the Arklow Bank Floating Light, and off the coast of Wexford, is the Glassgorman Bank, on the north-east point of which there is a large buoy of black colour, having red stripes painted length-ways on the sides of the buoy

ENLARGED SliltlliS.—NO- 12.—VOL FOR 1841. 5 S

and the words " Glassgorman Bank," in white letters on the broad end: it moored in five fathoms at low water.

Arklow Rock (outer point) bearing . . N.b.W.

Tara Hill ". . West

'I'll* hearings stated are magnetic.

By Order, H. Verekxr, Ste.

The Havre Rock, Norlh of New Zetland.

The following is important to navigators, not having yet found its way intofl\e charts. It appears to have connection with a group of islands to t!.c northeast of New Zeeland.

"dipt, l'rivat, of the whaler Havre, reports, that he has discovered, in the waters of New Zceland, 5} leagues W.N.W. .; N. by compass, of tlic rock Esperance (middling variation 12" NV N.E) a dangerous rock. According to soundings of the eaptain, it is the extremity of a rock about the size of a ship with only three to four feet water on the top of it, whilst all around it there were from twelve to nineteen fathoms. This rock is situated at 31" 19' S. lat., and 178° 35' E. long., according to two chronometers, which also agrees with ttie situation of the Rock Esperance. As this rock as yet never was laid down in any chart, the captain hits given it the name " Havre."—Shipjueg Gaztife~

Leghorn Light.

The Grand Ducal Government of Tuscany has given notice that the light e-f the Port of Leghorn (Livorno) in latitude 43" 32' 11" North, and longitude 10° 17'25" East, which has hitherto been a fixed Eight, will appear from the I5th of next December as an Intermitting Light, alternately Red and White, each for an interval of forty seconds, and with intervening eclipses.

The height of the light, being 151 feet above the sea, will render it visible at the distance of 20 miles; and during the eclipses n faint light may be seen within the distance of 9 miles, the total darkness not being complete except Heyond that distance.

Light-houses And Beacons.

Extract of a letter received at Lloyd's, from their agent at Sydney, Cape Breton, dated Sept, 27, 1841 :—

"I observe in some of the charts made up to 1839, that they have omitted to lay down the Light-house at Flat Point, at the entrance of this river, and instead of a beacon at the mouth of Louisbourg-harbour, a Light-house is laid down."

These are the kind of charts by which some ships are sailed; incorrect even to placing a beacon instead of a lighthouse, or a lighthouse instead of a beacon. Then the ships are lost and the charts are blamed. We advise their owners to consult the admiralty charts.

The Maidens Light-house In A Foo\

To render our light-houses conspicuous at all times and under all circumstances of weather, is a very important object. In clear weather, by night or day, they are sufficiently visible, but in fog they are unhappily not so There are conditions, however, which may assist in rendering them conspicuous, if due attention he paid to them. With few exceptions it has been a general uwtoin to- whitewash die buildings, or paint them while, tlius tendering

[graphic]

"(hem perfectly invisible at any moderate distance in foggy weatlier. A white light-house is certainly rendered moro conspicuous by n dark back ground either of downs or cliffs, but the cliffs in a fog would be seen when the light-house would not be.

Again, when seen with no back land whatever, owing to their having instrong contrasting colour, or being white of the same nature as the fog itself, they become fairly concealed by it, at the very time when they are most wanted.

This subject has engaged the attention of Capt. Bccchey, a.s, who in the •course of his survey of St. Georges Channel has had frequent opportunities of observing this great defect To remedy it he suggested that a band or porliou of the building should be painted red, which suggestion has been adopted will* complete success. The Ballast Office at Dublin has readily carried out his plan on the Maidens Light-house, as will be seen by the following notice, and the good effects of it have become evident We annex Capt. Beechey's report on it, accompanied by a lithographic view, which he has sent us, showing that the part of the Maidens light-house which has undergone the process is distinctly visible through fog, while the other part is concealed by it We have also a letter from a Master of the Royal Navy confirming this fact. Our commissioners of lights will see the importance of this subject to our coast navigation, and we have no doubt will give it immediate attention.

Maidens Rocks Light-houses, North-cast Coast of Ireland.

Ballast Office, DitWin, Sept. Oth, 1811. The Corporation for Preserving and Improving the Port of Dublin, hereby give notice that an alteration is now in progress of being made in the appearance of the towers of the Maidens Rocks Light-houses, which on and from the 1st of November next, will be marked with 'broad red belts or zones.

Specification given of the appearance of the towers, by Mr. Halpin, the Inspector of Light-houses.

Those towers have been hitherto coloured white; the lower spaces will be still continued white; the ceutral belts red; and above these, white to the projecting galleries.

The red belts or zonc3 will he nearly one-third of the heights of the towers from their bases to the outside galleries.

The belt being 18 feet in height on the North Light-house.

"19 ■" South-ditto.

Note—No change will take pluce in the appearance of the Lights.

By Order, 1L Veueker, Set.

The Maidens Light-ikmjses. Dear Sin.—A few days ago we had an escellent opportunity of observing the improvement that has been made in the colouring of the Maiden Light-houses, by painting a broad red stripe across tlie tow«r, which before was entirely ■white.

We were endeavouring to make these tight-houses in very hazy weather, and when within about a mile, we observed three dark spots somewhat elevated, and a long dark line at the horizon. The spots proved to be the red band which had been recently painted, and the slated roofs of the light-keepers' ■cottages; whilst the dark line at the horizon was the natural culour of the rock below the whitewash, but no part erf the related tower or of tlie rocky island which had been whitewashed could be discovered; and it was not until we were •quite close that we could discover a faint outline of these objects, the appearance of which may be imagined from the sketch annexed.

There could not have been a stronger proof of the great mistake that hag heen made in white-washing many of the lighthouses in this sea, in the hope of rendering them more conspicuous, but especially in the Maiden towers .and rocks, which have bcui annually coated with lime down to the waters' edje^

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