We will not enter into a minute detail of the many advantages that would result to the nation, either morally or politically, from the abolition of slavery, in the District aforesaid.--But we feel it an imperious duty to state, that in our opinion it would be attended with the most salutary effects on other portions of the Union, the _influence_ of which would be incalculable. Under the present regulations, that distinguished spot on which is erected the sacred Fane of republican Freedom, is not only polluted by the galling shackle and the iron rod of oppression, but is absolutely converted into a great depository for the purchase and sale of human beings. The demoralizing effect which this must produce on the minds of many who become familiarized with it, and the odium which it attaches to us, in the estimation of enlightened foreigners, many of whom are constant witnesses thereof, must inevitably sap the foundation of our free institutions, and degrade our national character in the eyes of the world. This, we conceive, (to say nothing of the injustice of slavery and its concomitants,) should be a sufficient incentive to action--a sufficient inducement to labor in the holy cause of emancipation. We are aware that it has been asserted, even on the floor of Congress, that we should wait until the people of that District themselves demand the abolition of the system of slavery. This doctrine we conceive to be fallacious. _The people there are not exclusively responsible for the national disgrace and criminality attending it._ The United States government, and of course, the people in every section of the Union, must bear the odium and meet the consequences:--and if so, it follows, that they have a perfect right to avert the same, by such just and legal means as their wisdom may point out, and their judgment select. But a portion of the people of that District _are_ now demanding the eradication of the evil in question. Societies for the abolition of slavery have been organized among them; and they have protested against the continuance of the cruel and disgraceful practice. Let, then, the voice of their brethren elsewhere, be heard in unison with theirs. Let a strong appeal be made to the justice of the nation, that the constituted authorities may be induced to take up the subject, and bestow upon it that care which its importance imperiously requires. To facilitate the accomplishment of this purpose, we would advise and recommend, that petitions and memorials be circulated by all the anti-slavery societies in each of the States and territories, for the signature of the citizens at large, and that they be forwarded to Congress by the Representatives, with instructions to lay them before that body, at an early day.