The bill for the admission of California as a State in the Union, was called up in the Senate and sought to be amended by extending the Missouri Compromise line through it, to the Pacific Ocean, so as to authorize slavery in the State below that line. The amendment was introduced and pressed by Southern friends of the late Mr. Calhoun, and made a test question. It was lost, and the bill passed by a two-third vote; whereupon ten Southern Senators offered a written protest, the concluding clause of which was: “We dissent from this bill, and solemnly protest against its passage, because in sanctioning measures so contrary to former precedents, to obvious policy, to the spirit and intent of the constitution of the United States, for the purpose of excluding the slaveholding States from the territory thus to be erected into a State, this government in effect declares that the exclusion of slavery from the territory of the United States is an object so high and important as to justify a disregard not only of all the principles of sound policy, but also of the constitution itself. Against this conclusion we must now and for ever protest, as it is destructive of the safety and liberties of those whose rights have been committed to our care, fatal to the peace and equality of the States which we represent, and must lead, if persisted in, to the dissolution of that confederacy, in which the slaveholding States have never sought more than equality, and in which they will not be content to remain with less.” On objection being made, followed by debate, the Senate refused to receive the protest, or permit it to be entered on the Journal. The bill went to the House of Representatives, was readily passed, and promptly approved by the President. Thus was virtually accomplished the abrogation of the Missouri compromise line; and the extension or non-extension of slavery was then made to form a foundation for future political parties.