In that meeting the profound intellect — the science of the Free-labor States--was represented by Professor O. M. Mitchel, one of the brightest lights of the century, who also gave his services and his life in defense of the Union. No speech on that occasion thrilled the vast multitude who heard his voice more than that of Professor Mitchel. “I have been announced to you,” he said, “as a citizen of Kentucky. Once I was, because I was born there. I love my native State as you love your native State. I love my adopted State of Ohio as you love your adopted State, if such you have; but, my friends, I am not a citizen now of any State. I owe allegiance to no State, and never did, and, God helping me, I never will. I owe allegiance to the Government of the United States.” After referring to his own education at the Military Academy at West Point, he said:--“My father and my mother were from Old Virginia, and my brothers and sisters from Old Kentucky. I love them all; I love them dearly. I have my brothers and friends down in the South now, united to me by the fondest ties of love and affection. I would take them in my arms to-day with all the love that God has put into this heart; but, if I found them in arms against my country, I would be compelled to smite them down. You have found officers of the Army who have been educated by the Government, who have drawn their support from the Government for long years, who, when called upon by their country to stand for the Constitution and for the right, have basely, ignominiously, and traitorously either re-signed. their commissions or deserted to traitors, and rebels, and enemies. What means all this? How can it be possible that men should act in this way? There is no question but one. If we ever had a Government and a Constitution, or if we ever lived under such, have we ever recognized the supremacy of right? I say, in God's name, why not recognize it now? Why not to-day? Why not forever? Suppose those friends of ours from Old Ireland — suppose he who made himself one of us, when a war should break out against his own country, should say, ‘I cannot fight against my own countrymen,’ is he a citizen of the United States? They are countrymen no longer when war breaks out. The rebels and the traitors in the South we must set aside; they are not our friends. When they come to their senses, we will receive them with open arms; but till that time, while they are trailing our glorious banner in the dust; when they scorn it, ”