The district court where either party resides, has, jurisdiction of the subject matter of this chapter. [§3411]. State legislatures have power to grant divorces in all cases where such power has not been conferred on the courts of the state by some constitutional provision or legislative enactment. The legislature of this state has been deprived of the power to grant divorces for any cause by Article 3, §27, of the constitution, which provides that "no divorce shall be granted by the general assembly." A divorce obtained from a court not having jurisdiction is absolutely void. The residence necessary to give the court jurisdiction must be permanent, or at least of a sufficient period of time to indicate an intention of continued residence and citizenship. The general rule is that the domicile of the wife and children is to be considered the same as that of the husband, but in a proceeding for divorce the law recognizes that husband and wife have separate domiciles, and a valid divorce may be granted where only one of the parties resides, but if they reside in different states, the court having jurisdiction of the party making application for the divorce may grant the decree, but it has no authority to make a decree as to the custody of the children, if they are non-residents of the state where the decree of divorce is rendered. A decree of divorce can always be set aside for fraud in obtaining it. [Sidenote: Petition.] When the application for divorce is against a party not residing in this state, the petition, in addition to the facts on account of which the applicant claims the relief sought, must state that such applicant has been for the last year a resident of the state, stating the town and county in which he has resided, and the length of his residence therein, after deducting all absences from the state; that he is now a resident thereof; that such residence has been in good faith and not for the purpose of obtaining a divorce only; and it must in all cases state that the application is made in good faith and for the purpose set forth in the petition. [§3412.] [Sidenote: Verification. Evidence. Hearing.] All the allegations of the petition must be verified by oath and proved by competent evidence. No divorce shall be granted on the evidence of the applicant alone, and all such actions shall be heard in open court on the testimony of witnesses or depositions. [§3413.] No divorce can be granted by consent of parties unless grounds therefor can be shown by competent evidence, and if collusion or conrivance on the part of the defendant can be shown, such fact will be a valid defense. [Sidenote: Causes.] Divorce from the bonds of matrimony may be decreed against the husband for the following causes: 1. When he has committed adultery subsequent to the marriage; 2. When he wilfully deserts his wife and absents himself without a reasonable cause for the space of two years; 3. When he is convicted of felony after the marriage;