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and balloons. The blades of the propellers are arranged on the main shaft in such a manner that those uppermost not being em. ployed in propelling the vessel are turned edgewise by suitable mechanism, thus offering no resistance to the medium. By tarning the lower blades of the propellers edgewise instead of the apper, the shaft continuing its rotation, a reversed motion is obtained.

BELGIUM 46630. M. H. Alberger and S. W. Pettit. “Improvements in telegraphic cables and in their manufacture."

46666. A. Farry. “An apparatus for maintaining the water level in steam boilers.”

FRANCE. 124432. Bazin. “A vessel with beams (balanciers).” 124447. Lagarde. “A boat propelled by hydraulic pressure.”

124285. Conti de Barbaran. "A helicoid engine for propelling vessels, &c.”

124257. Wadsworth. “A motor for rudders, carriages, &c." 124276. Baatard. “A system of oars." 124381. Bourke. “ Apparatus for launching boats, &c.” 124425. Castaing. “A life apparatus.” 124476. Febore. “Illuminating the surface of balloons.” 124347. Somzée. “A submarine bridge.”

GERMANY. 3581. E. Cutlan, London. “An apparatus for cleaning ships' bottoms."

BRITISH INDIA. 89/77. J. Pintsch, Berlin, Engineer. “Improvements in floatinglights, and in apparatus for the same."

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South Coast-Poor Head Proposed siren fog-trumpet.
NORTH SEA — Netherlands - North Sen Alteration of lights.

Ship Canal
Eginond-aan- Proposed alteration of lights.

Zee
Zuider-Zec Re-exhibition of light in new posi.

Harlingen tion.
Schleswig-Holstein -- Sylt New leading light.

Island-Junkmarsch
BALTIC ENTRANCE-Sound-Svinbadarne Temporary light-vessel, and fog.

bell.
BALTIC-Sweden-Öland Island

Alteration of light.

Alteration of light.
Grimskär

Alteration of light.

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New siren fog-trumpet.
New siren fog-signal.

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Grosa Island Bell-buoy.
BLACK SEA - Sevastopol — Cape Kher: Temporary alteration of light.

sonese
Kertch Strait-Cape Yeni- Temporary alteration of light.

kale
North ATLANTIC-Canary Islands Floating wreck.
INDIA-Bay of Bengal-Cheduba Island Reported sunken danger.
Martaban Gulf-Krishna Shoal Blue lights and maroons.

Light-Vessel
China SEA-Cochin-China-Banks Report on various dangers.

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NAUTICAL NOTICES.

1.-ENGLAND.-Entrance to the River Thames.New Buoy in East Swin.—With reference to Notice, see p. 1,120, vol. for 1878, an 8-foot can buoy, in Black and White Vertical Stripes, marked “West Hook Middle," has been placed about midway between the S.W. Middle and North Hook Middle Buoys, in 7 fathoms, with the following marks and bearings, viz. :Whitaker and Buxey Beacons, in line N.W. Wly. ; Brightlingsea Church Tower { from No. 2 Martello Tower, on the Mound towards Brightlingsea Chapel, N. 1 W. Wly.; S.W. Middle Buoy, S.W. by W., distant 145 miles; Swin Middle Light-vessel, W. by S. I S., distant 13 miles; Whitaker Beacon, N.W. Wly., distant 14's miles; Whitaker Buoy, N.E. by N., distant 11% miles; North Hook Middle Buoy, E. by N. Į N., distant 1% miles. Also an 8-foot conical buoy has been substituted for the can buoy formerly at the Rough.

2.—IRELAND.East Coast.Intended Alteration in North Arklow Light.—During the spring of 1879, the two fixed lights now shown from North Arklow light-vessel will be discontinued, and in lieu thereof one revolving light will be exhibited, showing two flashes in quick succession, followed by an interval of forty-five seconds of darkness, the whole revolution occupying one minute. The lightvessel will be distinguished in the day-time by having one mast with a ball at the masthead, and a jigger mast. Further notice will be given.

3.-IRELAND.—S.E. Coast.-Fog Station at Tuskar Rock Lighthouse.—On or about the 1st of February, 1879, a rocket fogsignal will be established at this lighthouse. The rockets will be discharged every five minutes, which, on reaching an altitude of about 400 feet, will explode with a loud report,

4.-IRELAND.—South Coast.Cork Harbour.-Intended FogSignal at Poor Head.—To be established early in 1879, at Poor Head, 3 miles south-eastward of the entrance to Cork Harbour. It will be a siren trumpet, which, during thick and foggy weather, will give one blast of five seconds' duration every two minutes. l'urther notice will be given.

5.-North Sea.--NETHERLANDS.—North Sea Ship Canal. Alteration in Leading Lights at Noordzee (Ymuiden) Harbour.-On or about 1st January, 1879, two lights will be exhibited from lighthouses recently erected on the south side of the canal entrance, and which, when in line, will lead in mid-channel through the outer harbour. They will be fixed white lights, elevated 169 and 136 feet respectively above high water, and visible from seaward between the bearings N.E. by N. and S.W. by S. from the distances of 19 and 18 miles. The lighthouses, constructed of iron, and circular in shape, are painted in red and white bands; they are situated westward of the sea sluices, on the south shore of the canal, and bear from each other S.E. by E. } E. and N.W. by W. { W., distant 612 yards. Position of low lighthouse, lat. 52° 27' 45" N., long. 4° 34' 30" E. On the exhibition of these lights, the temporary leading lights (red and white) will be discontinued. Variation, 161o W.

6.—NORTH SEA. — NETHERLANDS. — Temporary Discontinuance and Intended Alteration in Egmond-Aan-Zee Lights. — The two lights (fixed white) are to be replaced by fixed red lights.

7.-NORTH SEA.–NETHERLANDS.—Zuider Zee.Harlingen.Re-exhibition of Outer Leading Light, Pollen Channel.—The outer leading light (fixed white) is now re-exhibited from a structure on the North Harbour Mole, 55 yards westward of its former position. This light, in line with the innermost or south light, leads southward of the dam, through Pollen Channel, which has been rebuoyed.

8.—NORTH SEA.— SCHLESWIG-HOLSTEIN. — East Side of Sylı Island.-Light at Munkmarsch Harbour.—In addition to the Northern leading light (fixed white), established in 1877, the Southern leading light (fixed white) is now exhibited. These lights in line lead through the channel recently made between the sand banks, to Munkmarsch harbour; they should be visible through an arc of 90°, between Lister Ley and Wester Ley, from a distance of about 6 miles.

9.–BALTIC ENTRANCE. — SWEDEN. — The Sound. - Temporary Withdrawal of Svinbadarne Light-Vessel, and Alteration in FogSignal.—This light-vessel has been withdrawn from her station

westward of Jungnäs shoal, and replaced by another light-vessel ; and during thick and foggy weather, whilst the temporary lightvessel is in position, a bell will be rung.

10.–BALTIC.-SWEDEN.-Öland Island. Alteration in Södra Udde Light. This light, on the south extreme of Öland island, has been altered as follows :-It is a fixed and flashing light, showing fired to seaward and over Kalmar sound, between the bearings of S. 11° W. and S. 16° E.; two flashes in quick succession followed by an eclipse of four seconds' duration between the bearings S. 16° E. and S. 9° E.; fixed between S. 9° E. and S. 4° W.; and a single flash of one second duration followed by an eclipse of four seconds betweon S. 4° W. and S. 11° W. Variation, 91° W.

11.–Baltic. — SWEDEN. Öland Island. - Alteration in Ispe Udde Light.—This light (fixed), on the west side of Öland Island, now shows white between the bearings N. 56° E. and N. 70° E.; red between N. 70° E. and S. 18° E.; and white between S. 18° E. and S. 331° W.

Note.--It is intended at a future date, that the light shown between the bearings N. 56° E. and N. 70° E. shall be a flashing light. Variation, 93° W.

12.–BALTIC.-SWEDEN.Kalmar Sund.-- Alteration in Grimskür Light. With reference to notice in 1878, the following alteration has been made:-The light is a fixed and flashing light, showing tuo flashes in quick succession followed by an eclipse of four seconds' duration between the bearings N. 1° E. and N. 17° E.; fired between N. 17° E. and N. 31° E.; and a single flash of one second duration followed by an eclipse of four seconds between N. 34° E. and N. 50° E. In the approach to Kalmar harbour from the north ward, there are also shown two flashes in quick succession followed by an eclipse of four seconds' duration between the bearings S. 31° W. and S. 35° W.; a fixed light between S. 35o W. and 37° W.; a single flash of one second duration followed by an eclipse of four seconds between S. 371° W. and S. 41° W.; a fixed red light between S. 417° W. and S. 53o W.; and a fixed light between S. 53o W. (through west) and N. 1° E. Variation, 91° W.

Note.-With Grimskär lighthouse bearing between N. 17° E.

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