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CORRESPONDENCE.

DAVIS'S SUN'S TRUE BEARING OR AZIMUTH TABLES.

To the Editor of the Nautical Magazine." SIB,-Allow me to draw your readers' attention to an erratum in my Azimuth Tables, kindly communicated to me by Captain James Gordon, of the s.s. City of Mecca.

It is on page 194 under Declination 4° :

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I am,

Sir,

Your obedient servant, 2, Fairfield, Charlton, Kent, PERCY L. H. DAVIS.

November, 1879.

NOTES OF A VOYAGE FROM CHINA TO AUSTRALIA.

To the Editor of the Nautical Magazine." SIR,—Having taken in your valuable journal for some years, and deriving a great deal of benefit from information found therein, I would like to contribute some items connected with a voyage from China to Australia, and back to China, which if you think worth you can publish.

We left Hong Kong on the 11th August for Sydney, New South Wales, and passing out into the Pacific Ocean north of Luzon, proceeded south to the west of the Pellew islands, and passing within eight miles of the Sequiras Isles, as marked on Imray's sheet of the Eastern Archipelago, without seeing anything of them from the masthead at sunset, although the weather was clear. The next day, the 18th August, at noon, our latitude was 6° 56' N., longitude 132° 36' E. The day very clear, and favourable for seeing a long distance; but from the masthead we could see nothing of the Johannes Isles, which are laid down on the chart about this position. Our chronometers were rated in Hong Kong before we left, and the observations were good.

We had light S.E. 1-3 winds from leaving Hong Kong till we got to 15° S., and from there to Sydney N.E. and Easterly, 3-4 fine weather ; not a shower of rain.

Currents from Luzon to 6° N., half a mile an hour to S.W.; 6° N. to 21° N., ope mile an hour to Eastward ; 21° N. to St. John's, one and a half mile an hour to Westward. Little current in the Coral Sea, and strong southerly currents on the coast of Australia. We passed between New Ireland and the Soloman group both going and coming, and had the currents nearly alike both times, and winds also till we got to 10° north, when we had N.E. winds. We passed in sight of Mellish reef, but saw no beacon of any sort on it, so suppose it has been washed away. Squally Island, off the north coast of New Ireland, I found only to be about two miles square, instead of fifteen long and three broad, as it is in the charts I have ; it is low, but covered with trees of a good height. Some canoes came off with about 40 men in them, and we saw about 150 more inhabitants on the shore.

We passed within ten miles west of the island of Kumi (Meiaco-Sima Group), and saw no signs of broken water either to N.W. or S.W. of it, as reported and marked on charts; neither did we see anything of the Islet reported as existing in lat. 24° 9' N., long. 122° 23' E. We had clear weather and a moderately high

sea.

Found the Kuro-Sima current running 11 knot an hour as we passed Kumi. I am, dear Sir, yours very truly,

JAMES ROSS, Master. S.S. Benledi, 9th November, 1879,

Foochow.

RAPID STEAM COMMUNICATION WITH AUSTRALIA via CAPE OF Good HOPE.—The s.s. Orient, of which we spoke in the December number of the Nautical Magazine, has made the passage from Plymouth to Adelaide, calling at St. Vincent and the Cape in 37 days 22 hours; and, including the time of stoppage, in 36 steaming days.

TIDE TABLES FOR JANUARY, 1880. Also Ports of Reference for the Constants in the next Table.

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II. M. H. M.U. M. H. M.J. M. H. M. u. M. II. M. H. M. U. M. H. M. H. MH. M. H. M. 4. M. H.M.1, M. H. M M. H. M.II. M. II. MU. M. H. M. H. M. II. M. 4 4 4 21 8 86 8 54] 5 29 6 481 4 24 4 43 7 88 7 56 1 8 1 27 8 57 9 141 8 1 26 1 57 2 16 7 8 7 20 0 69 1 18 9 68 10 16 5 49 0 7

9 19 9 82 6 8 6 28 5 2 5 2 8 14 8 38 1 47 37 931 9 1 1 44 2 2 2 34 2 63 7 15 8 41 37 1 57 6 16 5 30 9 5210 12,6 49 7 10 5 44 6 6 8 62 9 11 2 27 2 4710 610 24 2 21 2 41 3 12 3 31 8 23 8 42 2 18 2 89|11 20 11 46 7 6 7 28

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0 51 1 20 5 31 5 582 29 2 55 1 24 1 51 4 43 5 11 10 17 10 46 5 59 6 29 10 32 10 5711 14 11 42 4 8 4 34 10 24 10 46 7 12 7 39 2 56' 8 22

48 2 14 6 25 6 50 3 19 3 43 2 17 2 11 5 38 6 5 11 13 11 39 6 56 7 20 11 22 11 46
2 35 3 0 7 14 7 884 6 4 293 3 3 25 6 30 6 53 0 67 43 8 6 - 0 9 0 81 0 585 51 6 11 11 57
3 24 3 478 1 8 22 4 52 5 14 3 47 4 9 7 13 7 33 0 29 0 52 8 27 8 46 0 32 0 59 1 21 1 436 35 6 50 0 20 0 42 9 28 9 47 5 17 5 87

5 85 5 56 4 30 4 51 7 53 8 13 1 14 1 36 9 5 9 23 1 14 1 34 2 8 2 23 7 16 7 30 1 4

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10 31 3 50 4 101 1311 37) 3 16 4 8 8 8 3910 50 11 22 4 31 4 55

0 4 33 5

5 21 5 57 0 35 1 11 5 37 6 18 6 16 6 5211 38-540 6 15 2 54 8 3410 33 11 17 229 29 20 13 1 55 2 3111 36 -- 10 30 11 70 80 1 8 6 33 7 15 1 52 2 33 7 0 7 41 7 32 8 12 0 18 0 546 51 7 28 4 9 4 42 - noon

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0 7 4 18 4 17 1 21 1 48 0 10 0 43 3 2 3 37 9 0 9 25 4 29 4 59 9 22 9 459 57 10 24 2 49 3 10 9 10, 9 30 6 8 6 23 1 44 2 9

21 5 12 5 32 2 11 2 33 1 5 1 26 4 7 4 33 9 49 10 11 5 27 5 51 10 6 10 25 10 46 11 8 3 40 4 2 10 0 10 20 6 467 7 2 31' 2 51 25 1 11 5 51 6 10 2 51 3 91 47 2 6 4 57 5 18 10 31 10 51 6 13 6 85 10 44 il 911 29 11 49 4 22 4 4210 37 10 54 7 27 7 46 3 10 3 28 6 29 6 48 3 26 3 43 2 24 2 425 37 5 56 11 11 11 31 6 55 7 14 11 21 11 89 04 59 3 15 6 15 6 341

0 28 0 46

38 5 5011 45
4 34 4 52 3 31' 347 6 53 7 11 0 10 0 28 8 7 8 23 0 15 0 33 1 4 1 22 6 13 6 30 0 2 0 20 9 8 9 21 4 56 5 13
8 18 8 35 5 10 5 281 4 4 4 3 7 26 7 4: 0 47 1 6 8 39 8 0 50 1 1 39 1 56 6 48 7 0 0 38 0

| 4 40 4 58 8 1 8 19 1 25 1 44 9 13 9 30 1 21, 1 422 13 2 81 7 24 7 42 1 14 1

TIDAL CONSTANTS For Various BRITISH, IRISH, AND EUROPEAN PORTS. By applying the Tidal Constant of the place, according to its sign ( + add - sub.), to the time of high water on the given day at the port of reference, you have the time of high water at the place sought.

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PORT OF
PLACE. CONSTANT.

REFERENCE.

H. M. Aberdeen

-1 17 Leith Aberystwyth

-3 52 Liverpool Alderney.

+2 59 Brest Antwerp..

+5 13 Dover Arbroath.

- 42 Leith Arcachon

+0 50 Brest Arklow

-2 25 Kingstown Ayr

-O 18 Greenock Banff

-1 49 Leith Bantry harbour

-1 14 Queenstown Barnstaple bridge -O 26 Weston-s.-Mare Bayonne

-02 Brest Beachy head & Rye bay + 8 Dover Beaumaris

-O 51 Liverpool Belfast

+2 42 Londonderry Berwick

-1 5 N. Shields Blyth

-O 8 N. Shields Bordeaux

+3 3 Brest Boulogne

+0 13 Dover Bridport.

+0 22 Devonport Bristol & King Road +0 19 Weston-s.-Mare Cadiz

-2 2 Brest Caernarvon

-1 56 Liverpool Calais

+0 37 Dover Campbellton

- 23 Greenock Cardiff..

+0 2 Weston-s.-Mare Cardigan bar..

- 4 22 Liverpool Carlingford bar -O 10 Kingstown Chatham..

-O 47 London Cherbourg

+4 2 Brest Coleraine

-1 37 Londonderry Coquet Road..

-O 23 N. Shields Cordouan Tower

-O 10 Brest Cowes (West)

-027 Dover Crinan

+4 41 Greenock Cromarty

-2 21 Leith Dartmouth.

+0 33 Devonport Deal & Downs

+0 3 Dover Dieppe

+7 19 Brest Donaghadee

+0 3 Kingstown Donegal harbour +0 17 Queenstown Douglas & Ramsay ....-0 11 Liverpool Dublin bar

+0 2 Kingstown Dundalk

-0 16 Kingstown Dungeness

-O 27 Dover Dunkerque.

+0 56 Dover Exmouth

+0 33 Devonport Falmouth

- 46 Devonport Fecamp

+6 57 Brest Ferrol

-O 47 Brest Flamborough head -1 59 Hull Fleetwood

- 12 Liverpool Folkestone.

-O 5 Dover Fowey

-O 29 Devonport Flushing.

+1 42 Dover Galway bay

-0 26 Queenstown Gibraltar

-1 27 Brest Glasgow (Port)

+0 10 Greenock Gloucester

+2 51 Weston-s.-Mare Granville

+2 26 Brest Gravesend

-O 48 London Grimsby (Great) -O 53 Hull Guernsey (St. Peter) .. +2 50 Brest Hartlepool

+05 N. Shields Harwich

--1 52 London Havi

+6 4 Brest Helgoland

+0 21 Dover Holyhead

-1 12 Liverpool Holy Island harbour -O 53 N. Shields Honfleur

+5 42 Brest Inverness

-1 59 Leith

PORT OF PLACE. CONSTANT.

REFERENCE

H. M. Jersey (St. Helier) +2 38 Brest Kinsale

-0 18 Queenstown Lerwick (Shetland) -3 47 Leith Limerick..

+1 15 Queenstown Lisbon bar

-1 17 Brest Littlehampton

+0 24 Dover Llanelly bar

-0 38 Weston-s.- Man Lowestoft

-4 1 London Lynn & Boston Deep .. -0 29 Hull Margate

- 2 18 London Maryport

+0 3 Liverpool Milford Haven entr. -0 58 Weston-s.-Mar Montrose

-0 52 Leith Morlaix

+1 6 Brest Needles point

-1 26 Dover Newcastle

+0 23 N. Shields Newhaven

+0 89 Dover Newport

+0 16 Weston-s.-Max Nieuport

+1 6 Dover Nore

-1 38 London Orfordness

--2 43 London Oporto

-1 17 Brest Ostende

+1 13 Dover Padstow

-1 41 Weston-s.-Mar Peel, Isle of Man -O 15 Liverpool Pembroke Dock

-43 Weston-s.Penzance

-1 13 Devonport Peterhead

-1 43 Leith
Piel harbour, Barrow.. -0 18 Liverpool
Plymouth breakwater -O 6 Devonport
Poole

-2 2 Dover Port Carlisle

+0 47 Liverpool Portland breakwater +1 18 Devonport Port Patrick

- 58 Greenock Portsmouth

+0 29 Dover Ramsgate

- 2 19 London Rotterdam

+4 33 Dover Santander

-O 17 Brest Scarborough

+0 48 N. Shields Selsea bill

+0 33 Dover Sheerness

-1 21 London Shoreham

+O 22 Dover Sligo bay.

+0 17 Queenstown Southampton

-O 42 Dover Spurn point

-1 3 Hull St. Ives

-2 10 Weston-s.-Ma St. Malo

+2 18 Brest St. Mary (Scilly) - 1 16 Devonport St. Nazaire.

0 7 Brest Stornoway

+6 98 Greenock Stromness (Orkneys). --5 17 Leith Sunderland

- 1 N. Shields Swansea bay

-O 53 Weston-s..la Tay bar

-0 11 Leith Tees bar

+0 22 N. Shields Tenby

-1 12 Weston-s.-Ha Thurso

-5 49 Leith Torbay.

+0 17 Devonport Tralee bay

-0 58 Queenstown Ushant (Ouessant) -O 15 Brest Valentia harbour -1 19 Queenstown Waterford

+0 19 Queenstown Westport..

-0 4 Queenstown Wexford

+2 20 Queenstown Whitby

+0 22 N. Shields Whitehaven

--09 Liverpool Wick.

- 2 55 Leith Wicklow

-O 41 Kingstown Workington

-O 19 Liverpool Yarmouth road

-4 43 London Youghall.

+0 13 Queenstown

MARINE INVENTIONS. Monthly List of Patents-Communicated by Messrs. Wm. P. Thomp

son & Co., British and International Patent and Trademark Agents and Consulting Engineers, 323, High Holborn, London, WV.C., and 6, Lord Street, Liverpool.

ENGLISH (APPLICATIONS.) 4640. Gaspare Minisini, Turin, Italy. “Improvements in the means of obtaining motive-power from the motion of ships or Waves, and in the application of such motive-power for pumping, part of which improvements may be applied for the construction of pumps generally." (A communication.)

4708. James White, Glasgow. Improvements in, and connected with, electric bells, specially designed for signalling from the rooms of passenger ships, and hotels, and for other like purposes.”

4710. William Sayer, Derby. "A new or improved pressure and vacuum apparatus for starting, steering, stopping, and reversing torpedo and other boats."

4733. George Wilson, Westminster. “An improved method and apparatus for the purpose of propelling vessels, and also for other purposes."

4845. George F. Lyster, Liverpool. “Improvements in appliances for facilitating the discharge of grain and bulk cargo from ships."

4878. John Louis Lay, Paris, France. * Improvements in torpedo boats, and in apparatus to facilitate the working of the same." (A communication.)

4921. James Donaldson, Birkenhead. “Improvements in the construction of, and method of propelling, high speed torpedo and other small boats."

4958. Moska Marichenski, Poplar, Middlesex. “Improvements in apparatus for propelling boats.”

5053. Milton Stuart, Antwerp, Belgium. "Improved mode of shipping palm oil and other oils and greases of somewhat similar consistence, and improvements in, and appertaining to, receptacles for the same.” (A communication.)

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