A hirgo and oritlmsiastic TJnion meeting wus held n Detroit on Mondav aftornoon, on which occasion Firemen'a Hall was fillüd tp its utmost capacity, and thousande wero unuble to eflect an entraDce. Kon. Ross WiLKiNS_presded, BUftported by twenty Vice Presidenta, oompriniog prominent men of all partios, and sis Secretarios. Speeches wcre mado by Judge Wilkins, J. M. Howard, C. I. Walker, Q. V. N. Lotbrop, II. H Emmonn, Theodoro llomoyr., J. F. Joy, W. A. Howard. and othors, and tho following reaolutions were unanimouely adoptod :J Wierca.i, A se-lion of this Union iis in arma levying actual war against tho Federal Government ; Ilesnhed, That we the citiïens of Detroit, irrespective of party, and waiving all expression of opinión as to the causes which have prodiioed this unhappy Btrile; and as to the proper modo 01 redrese, heroby declare that it is tha dutv of ev. ry citizen tosustain the ConslitutJon dan the Government so long as actual war oxists ; therefore, it ia fnrt hor lletnlreil, Tha: we hereby pledgeotir undivided loyalty tothe maintainanceof the Government and its law, and in tbe present crisis we avow oor unitei purpose, if neod be to devote our lives, our fortunes and our acred honor to the support, of the integrity of that Government and the honor of its flag. Resolved, That a copy of these resohitiona certified, by the officers of this meetiosr, be sent to tho President of the United States.