Thesteamship Britannia, Captain Hewitt, arrived at this port Sunday mornmg, about 5 o'clock. She left Liverpool on the 19th uit., and brings datos to the day of sailing. She brought from Liverpool 79 passengers, and left 17 nt Halifax. There 3 no news of particular interest by this arrival. No material changes had taken place in the commercial relations. The markets were firm, and tb.2 pohÃ¼cal world was rcmnrkably quiet. The prospect for the grain crops whicli were in the course of reaping throughout England was still considered favorable, notwitlistanding some heavy rains which had injnred them in &ome quaiters. The eales ol cotton were largo, and prices rising. The Caledonia arrived at Liverpool on 1h 13thult. aftera passage of ten days fron Halifax. Parliament was to be prorogued on the 2-ltI uit. by the Queen in person, and both house: were engaged most energetically with th Ã¯ closing business of the session. It had beei ) occupied with the Irish Poor Laws, Emigra f 'j tion 'to Canada, the Treaty of Washington r RevisiÃ³n of theTariff, and the Foreign Polic; of Great Britain. d In tbc discussion of Irish affairs, Lor d Brongham alluded lo tho repcal meetings hel r in ),L country, and to the part tafc-en by Etobert Tyler, sou of the President. The I ing is an extract from lm speech: "But I have seen it etated that a person i nomed Tyler, said to be a relation of the Pres, 1 ident, has taken part in this ngitation. No ( one is ansvverublc for the fooleries - the i cessive fooleries - any one of hid family i es to cornmit, (a Intig-h) ; and I do not for one y moment believe haf, as has been said, the t President lias wrilten a letter to say that his 1 heirt and soul were in the cause. (Hear, r hear.) I will not believe it until I eee the a letter. Mr. Tyler is accidentolly President i of the United States; bnt by the same ( dent Ihat made him President, I hope & trust, and I have every reason to believe, that he inherits, with the President's chair, somo of j, the wisdom and prudence of his predecessors. c (Flear.) I wil! not believe that any man in j the situation of President Tyler, would write such a letter as that which I have seen ( stered ap in tome of the newspapers; as if the Queen of this country, like the President, y were to say that she had her heart and soul , in the cause of the Carolina and Virginia i groes, and that she hoped ere long to see a white republic in in the North, and a black ] republic in the South; and that the intolerable ] bond whirh now united them would be j ered. Why, we should have the British liamenl most justly upin arms, (hear, hear; ( but though I hold repeal to be as utlerly j diculons a measure, and as pernicions to be f entertained, as I certainly hold the tion of the Carolina and Virginia negroes ( would be a wise, humane, just, and virtuous act, yet God forbid that, if I were m a , tion of advising the Crown, I should tliink of , uttering advice, either in an official capacity , or an unofficial capacity, for the purpose of ( excitingthejealousy and embittering the ] mosity that may be supposed to have prevailed between the two countries. That is a course which no good citizen of hts own country or , of the world, & loving the peace of the world, i would thinkof advising." Export oj Machinery. - A very important measure for legalizing the export of machinery has passed recently. The new act will probably render Great Britain the workshop of the world as regards the manufacturing of machinery; but whether it will not also have a tendency to enable foreigners to beat us out of every foreign market is another question. Many of the speakers who supported the measure inclined to the the lalter opiniÃ³n; but, as free traders, they sacrificed their interest to their principies, which is somewhat of a novelty now-a-days in legislativo history. Falher Matheto, the npostle of Temperance, wus still in London, holding vast meetings in the suburbs, and administcring pledges to thousands daily Irelvnd. - In Ireland, matters continue stationary. One or two exciting debates have taken place in Parhament on the subject of the present anomaloua state of the country, lyhicl have exhibited some of (he mernbers of the Conservative party attackmg, witi grear bitternesÃ¡, the nothing policy of the gov ernment. Neilher the rent nor the exertions of O'Connell suffer any diminution. Foremost in the patliamentary fight has been Lord Brougham, to whom the present condition of Ireland is a source of great uneasness, and who Tor the purpose of putting an end to it, has been thrusting bis service? on the government: but they repulsed him. A great - perhaps the greatest - denionstration which has yet been made in favor of repea!, took place at Tara Hill - a memorable spot in the early history of Trelund and its kings, and celebrated even in late years by the resistance which was made there to the Kings' forces by the "Croppies" in the rebelhon of 1798 - on Tuesday last. AH the accounts concur in representing this as the greatest of all the "monster meetings." Wales. - The Rebecca riots in Soutli Wales still continue, and have hitherto defied the most energetic measures employed to put them down. Another event, too, has complicated the evils under which the people of Wales now groan. The copper-masters of the neighborhood of Swansea, owing to the great fall in the price of that article,have found themselves under the necessity of reducing their worktnen's wages. A turn-out has been the consequence: and several thousands of them are now voluntarily without employment. Jttcxandria, July L6. Captain Harris, who has been on a mission to Abyssinia on the part of the British and Indian Governments, left this for England by the Oriental, on the 20th inst. He has taken with him twenty-five cases of curiosities and ebjects of natural history, as presents from the King of Abyssinia fo the Queen, also a fine mule ot the breed of the royal stud, and a splendid saddle. Capt Harris mission has been so far snecessfu! that he was well received nnd treited by his Majesty, and has been able to enter into a sort of commercinl treaty, by which the exports and imports of certain artic'.es will be allowed; and since so much has been granted, very ' probably a trade of some importance may eventunlly be opened up with Abyssinia.