The Constitution of the United States provides: Full faith credit {shall be given in such state to the public acts, records judicial proceedings of every other state. And the Congress may by general laws prescribe the manner in which such acts, records proceedings shall be approved, the effect thereof. In pursuance of the power vested in it, Congress has prescribed the mode of authentication the effects of such acts, records proceedings as followss:' and the said records judicial proceedings so authenticated shall have such faith credit given to them inevery court within the United States as they have by law or usage in the courts of the state from which they are taken. It is a settled rule that the full faith credit clause applies only to substantive rights that it has no application to matters of procedure.2 Hence, if 'it can be shown that equitable decrees do not establish obligations, that is, right-duty relations, but are merely methods for the enforcement of existing legal relations, it follows of course that they are not within the purview of the full-faith credit clause. The first issue relates therefore to the nature effect of equitable decrees in general. If we go back as far as the Year Books we find Knightly, Sergeant at law, making the following statement :8 A decree is not like a judgment in the King's Bench or Common Bench, for such a judgment binds the right of the party; but a decree does not bind the right, but only the person to obedience, so that if the party will not obey, then the Chancellor may commit him to prison until he will obey this is all that the Chancellor can do. In another Year Book case the following appears :4