all the junctures, where the armour is made tight with leather, or skins, or such like, that if there be the least defect in any of them, the whole engine will instantly fill with water, which rushes in with such violence as to endanger the life of the man below, who may be drowned before he can

be drawn up. On which account, the danger increases with the depth."

The same contrivance, with more particulars, and a plate to illustrate them, may be seen in 'Clare on the Motion of Fluids,' p. 186 of the 3d edition, plate viii. which was published in 1747. Mr. Murray need not, therefore, be afraid of any patents being granted for this invention; but as he must, if he reads this account, be conscious of his own idea not being new to the public, he will see that it may have occurred again to another, who was as little aware of his experiments at Hull, as he was of Dr. Halley's publication. Nothing is more common than for the same plan to be independently suggested by ingenious

On the 4th of May, at eleven o'clock, their Majesties and suite, in seven royal carriages, left St. James's Palace, on a visit to Woolwich and Greenwich, preceded by a detachment of the 9th Lancers, and escorted by a troop of the same regiment. Among the members of the Royal Family who accompanied their Majesties, were their Royal Highnesses the Dukes of Cumberland and Gloucester, the Duchess of Cumberland, the Princess Augusta, and the two young Princes of Cambridge and Cumberland. In their suite were Lord Hill, Lord Com. bermere, Lord Byron, Lord A. Beauclerc, Lord F. Fitz Clarence, Lady A. Fitz Clarence, Madame D'Este, and the Marchioness of Westmeath. At twelve o'clock the royal party arrived at Woolwich, and were received by the military with the honours due to royalty. His Majesty, after a graceful acknowledgment of the enthusiastic acclamations with which he was received by the multitudes assembled on the occasion, proceeded to inspect the various parts of the

dockyard, accompanied by Sir James Graham and the Hon. Capt. Elliott. The miniature frigate, Royal Louisa, launched on the 2d inst, and intended as a present to the king of Prussia, principally attracted His Majesty's attention. After passing a short time in the dockyard, the royal party embarked in barges, amidst an assemblage of vessels on the river, which, being crowded with company, and displaying flags, produced a pleasing and animating effect. Although the weather appeared unfavourable, His Majesty, with his usual anxiety to gratify his subjects, refused to enter a covered boat, and, with Her Majesty, proceeded up the river in an open barge. Their Majesties landed at Greenwich at ten minutes past two, and were received by Sir R. Keats, the governor, and the officers of the Hospital, under a royal salute from the Park, and amidst the cheers of assembled crowds, of every rank and profession. After seeing the children of the Greenwich Asylum, His Majesty inspected the pensioners, who were drawn up for that purpose; and at five o'clock the royal party, attended by the former escort, left Greenwich, and arrived at St. James's Palace at six o'clock.

By the extract of a letter from Captain Dickinson, with which we have been favoured, dated 15th February, it appears that he had succeeded in recovering the anchors and chaincable, and some of the guns, of His Majesty's late Ship Thetis.

H.M.S. Vernon was launched at Woolwich on the 1st of May. We believe it was the intention of His Majesty to have witnessed this imposing spectacle, but the weather was too unfavourable to admit of it, and, consequently, produced much disappointment. Every thing being in readiness, at a quarter before two o'clock this magnificent vessel moved off her slip in graceful style, and descended into the river, amid the firing of cannon, and the huzzas of the spectators.

HERMES, St. V.-Lieut. A. Kennedy, Woolwich.

HYACINTH, 18-Com. W. Oldrey, 17th Jan. Montego Bay, 14th Feb. Port Royal. IMOGENE, 18-Capt. P. Blackwood, 22d Jan. sailed from Rio 16th Feb. arrived at Cape 22d Feb. sailed for India.

INVESTIGATOR, 16-Mr. G. Thomas, 16th May, at Ramsgate.

ISIS, 50-Capt. J. Polkinghorne, 31st Jan. sailed for Accra and Fernando Po.

JASEUR, 18-Com. F. Harding, 25th Jan. arrived at Mauritius.

KANGAROO, 3-Lieut. J. Hookey, 8th March arrived at Port Royal Jamaica. LEVERET, 10-Lieut. W. F. Lapidge, 7th April arrived at Madeira, 1st May returned to Plymouth.

LIGHTNING, 18-Com. T. Dickinson, on her way home.

LIGHTNING, St. V.-Woolwich.

MADAGASCAR, 46-Capt. E. Lyons, 5th Mar.

arrived at Malta; 26th March, sailed for Smyrna.

MAGICIENNE, 14-Capt. J. H. Plumridge, arrived at Rio 31st Dec. and sailed for India 5th Jan.

MAGNIFICENT, 4-Lt. J. Paget, Port Royal.
MAIDSTONE, 42-Capt. C. M. Schomberg, 14th
March at Rio, on her way home.
MASTIFF, 6, S.V.-Lieut. J. Graves, Ports-
mouth.

MELVILLE, 74-Capt. H. Hart, 3d Feb. arrived at Teneriffe. Flag-ship, V.-Adm. Sir J. Gore, K.C.B.

MESSENGER, St. V.-Lieut. B. Aplin, Woolwich.

MINX, 3-Lieut. J. Simpson, Port Royal. NAUTILUS, 10-Com. Rt. Hon. Lord G. Paulett, Feb. 21st, at Oporto from Cork. NIMBLE, 5-Lieut. J. M. Potbury, Bahama Islands.

NIMROD, 20-Lord E. Russell, Plymouth. NORTH STAR-Capt. Hon. G. W. Trefusis, 14th Feb. at Port Royal.

OCEAN, 80-Capt. S. Chambers. Flag-ship, Sheerness, V.-Adm. Sir J. P. Beresford, Bt. K.C.B.

ONYX, 10-Lieut. A. B. Howe, Cork. ORESTES, 18-Com. W. N. Glasscock, Irish Station.

PALLAS, 42-Capt. W. Walpole, 14th March arrived at Barbadoes from Trinidad. PEARL, 20-Com. R. Gordon, 8th March, sailed from Plymouth.

PELICAN, 18-Com. J. Gape, 22d April, at Patras.

PELORUS, 18-Com. R. Meredith, 31st Jan. arived at S. Leone, and sailed for Accra. PHILOMEL, 10-Com. W. Smith, 15th April, at Gibraltar.

PICKLE, 5-Lieut. T. Taplen, 5th Feb. arrived at Para.

PIKE, 12-Lt. A. Brooking, coast of England. PINCHER, 5-Lt. W. S. Tulloh, Bahamas. PLUMPER, 12-Lieut. T. Cresser, 18th Jan. River Gambia.

PLUTO, St. V.-Lieut. G. Buchanan, 3d Feb. arrived at Sierra Leone; 7th Feb. sailed for Accra.

PROCRIS, 10-Com. J. T. Talbot, 25th March, left Malta for Algiers and England. PYLADES, 18-Com. E. Blankley, 24th March, sailed from Pernambuco.

RACEHORSE, 18 Com. C. H. Williams, 2d April, left Barbadoes: 20th April, arrived at Halifax, from Bermuda.

RAINBOW, 28--Capt. Sir J. Franklin, Knt. 2d April, Corfu.

RALEIGH, 18-Com. A. M. Hawkins, 3d April, at Malta.

RAPID, 10-Com. C. H. Swinburne, 23d Mar. Nap. di Romania.

RATTLESNAKE, 28-Capt. C. Graham, 2d Dec. sailed from Rio.

RAVEN, S.V. 4-Lieut. W. Arlett, Africa. RECRUIT, 10-Lt. T. Hodges, 11th April, sailed for Halifax.

REVENGE, 78-Capt. D.H. Mackay, 15th April, Tagus.

ROSE, 18-Com. E. W. Pilkington, 2d April, at Bermuda.

ROYALIST, 10-Lieut. R. N. Williams, Oporto.

ST. VINCENT, 120-Capt. H. F. Senhouse, 29th Mar. Nap. di Roma. Flagship V.-Adm. Sir H. Hotham, K. C. B., &c.

SAMARANG 28, Capt. C. H. Paget, 4th Mar. at Bahia.

SAN JOSEF, 110- Capt. R. Curry, Plymouth, Flag-ship Admiral Sir M. Dixon, K.C.B. SAPPHIRE, 28-Capt. Hon. W. Wellesley, 28th Feb. arrived at Para, left 8th March, 15th March arrived at Barbadoes. SCYLLA, 18-Com. Hon. G. Grey, 23d March, at Napoli di Romania.

SERING APATAM, 46-Capt. Hon. W. Waldegrave; 21st Jan. at Islay, on way home. SKIPJACK, 5-Lieut. W. Shortland, Bahamas.

SNAKE, 16-Com. W. Robertson, Woolwich. SOUTHAMPTON, 52-Capt. J. M. Laws, 17th Sept. at Madras.

SPARROWHAWK, 18-Com. D. Mayne, 17th Jan. at Montego Bay.

SPEEDWELL, 5-Lt. W. Warren, Nassau. STAG, 46-Capt. Sir T. Trowbridge, 8th April, arrived at Madeira.

SULPHUR, 8-Com. W. T. Dance, King George Sound. Australia.

SWAN, 10-Lieut. J. E. Lane, North Sea. SYLVIA, 1-Lieut. T. Spark, North Sea. TALAVERA, 74-Capt. S. Brown, sailed 24th Mar. for Plymouth.

TALBOT, 28-Capt. R. Dickinson, C. B. 28th Jan. at Mauritius.

TRINCULO, 18-Com. R. Booth, commissioned 18th May, at Plymouth.

TWEED, 2S-Com. A. Bertram, 15th Feb. at Jamaica.

TYNE, 28-Capt. C. Hope, 18th March, left Pernambuco for Rio Janeiro.

UNDAUNTED, 46-Capt. E. Harvey, 7th Mar. in Simon's Bay.

VERNON, 50-Capt. Sir F. Collier, Knt. Woolwich.

VICTOR, 18-Com. R. Russell, 18th March, arrived at Bermuda.

VICTORY, 104-Capt. H. Parker. Flag-ship Admiral Sir T. Foley, G. C. B. Portsmouth.

VIPER, 6-Lieut. H. James, Sheerness Station. VOLAGE, 28-Capt. Right Hon. Lord Colchester, Pacific.

WARSPITE, 76-Capt. C. Talbot. Flag-ship Adm. Sir T. Baker, K.C.B., March, at Rio.

WINCHESTER, 52-Capt. Rt. Hon. Lord W. Paget, 2d April, left Bermuda for Barbadoes. Flag-ship Vice-Adm. Sir E. G. Colpoys. WOLF, 18-Com. W. Hamley, 21st. Feb. arrived at Ceylon.

ZEBRA, 18-Com. D. De Saumarez, 6th Dec. at Sydney.