All news from the Whig Convention on the 21, at Newark, agree in representing it as the greatest outpouring of young Buckeye Whigs that has been witnessed since the honorable Convention of 1840.— The old Harrison spirit of 1840 has been fairly aroused in Ohio. The Newark correspondent of the B. Fim re Patriot says: It has been a perfect avalanche of human beings! I arrived here from Columbus early yesterday afternoon, desirous of being a spectator of the great Young Men's Whig State Convention. I passed, and was passed by, thousands of enthusiastic young men, hurrying towards the point of attraction. In the evening, the delegates, to the number of several thousands, organized in and around the Court House, on the public square. Mr. Van Tromp, of Lancaster, presiding, addresses were delivered by Judge Oliver, of Cincinnati, and Mr. White, of Logan. The latter gentleman was particularly happy in showing up the enormous fraud attempted to be palmed upon the pro-Loco Foco Legislature. The congress hung at a stand, amid the ringing cheers of the multitude. But it is impossible to give you even a faint idea of the spectacle presented this morning—it beggars description. Procession after procession arrived, until the town was a perfect jam. At length, 'Tom Corwin,' was the cry that passed from mouth to mouth, and his arrival was hailed by shout after shout, that made the welkin ring. The town now presented to the eye one dense unbroken sea of heads. The Convention organized in the Public Square—Henry Stansbury, Esq. of Lucas Co., one of the clearest intellects and most eloquent men in the State, as I am informed, being nominated as President, and nineteen other gentlemen as Vice Presidents. Tom Corwin, was again the cry, and he appeared upon the stand amid the most deafening shouts of the assembled thousands. Notwithstanding the rain fell almost in torrents during all the time. Gov. Corwin enchained the attention of his audience for more than two hours, in one of the most matchless speeches for eloquence, pathos, and humor combined, that I ever listened to. After him, the Hon. T. Ewing, late Secretary of the Treasury, responded to the call of the Convention in a short but masterly speech, full of argument and sound, logical reasoning.— They are now reading to the Convention an Address to the Young Whigs of Ohio, said to be an able document, the production of Mr. Perry, of Columbus. It is impossible to give you any definite idea of the number of delegates in attendance. Those who are said to be versed in such matters, variously estimate the crowd to number from 15 to 25,000. You may rest assured that the right spirit is abroad in Ohio. The People are once more thoroughly aroused, and a majority of from 10 to 15,000 for the Whigs at the coming elections is confidently predicted.—Atlas