Opinon of the court by

The first error assigned and argued by the plaintiff in error is, that the court erred in overruling the -demurrer to the evidence on the ground that the plaintiff had failed to prove a cause of action.

*527 The defendant, is his answer, admitted the execution of the notes as alleged in the plaintiff’s petition, and therefore .admitted that the notes were signed by the plaintiff and de- ■ fendant as sureties for Strickler Brothers. The defendant .also admitted that the notes were paid, but'alleged in his an.swer said notes were fully paid by one Mendenhall, cashier of the Citizens Bank of Sheldon, Illinois, out of the proceeds of the property of the firm of Strickler Brothers. The plaintiff testified positively, in her own behalf, that she and ■ J. B. Strickler were sureties on said notes, and, also testified positively that said notes were paid with her property, which she had turned over to said Mendenhall, and that at the commencement of this action she was the owner and holder of said notes, and that no part of said notes had been paid by either the principals upon said notes, or by her co-surety, J. B. Strickler, the defendant herein.

It is an elementary principle of law that where two or more persons are jointly, or jointly and severally, bound to pay a certain sum of money, and one of them is compelled to pay the whole debt, the person so paying said indebtedness may recover contribution from his co-debtors. The evidence was clearly sufficient to warrant a recovery by the plaintiff in this action, and hence the demurrer to the evidence was properly overruled.

The defendant sought to prove, as a defense to said action, that the plaintiff, prior to the maturity of said notes, purchased an interest in the business of the firm of Strickler Brothers, and became a member of said firm, and ■assumed and agreed to pay the indebtedness of the said firm, including the notes herein sued on; and that both of said *528 notes were fully paid by Mendenhall out of the proceeds of the property of the 'firm of Strickler Brothers. Manifestly,, the burden of proof was upon the defendant in this action to prove that the plaintiff was a member of the said firm, and that she had assumed and agreed to pay the indebtedness of the said firm, including the notes in controversy. The plaintiff denied that she was a member of said firm, or that she-had assumed or agreed to pay any of its indebtedness; and contended that said notes were paid from the proceeds of her-property, which she had turned over to Mendenhall, the cashier of the Citizens Bank. Whether the plaintiff was a member of said firm, was a question of fact for the determination of the jury. And, likewise, if the jury found that she had become a member of said firm, as contended for by the defendant, then whether she assumed any of the indebtedness of the previous partnership was also a question of fact for the determination of the jury.

The evidence upon these controverted questions of fact was conflicting and contradictory; but we think there was competent evidence reasonably tending to support each of the-material allegations of the plaintiff in this action, and upon which the jury returned a verdict in her favor. The rulé-is well settled by this court that when the evidence is conflicting and contradictory, and there is evidence reasonably tending to support the verdict of the jury, and the trial court has approved the verdict and refused to grant a new trial, this court will not disturb such verdict of the jury, and the judgment of the court thereon.

In Everett v. Akins, 8 Okla. 184, this court said:“ Where a question of fact is submitted to the jury, and there is com *529 petent evidence tending to establish such fact, the verdict of the jury and the judgment of the court thereon are conclusive.”

In Archer et al. v. United States, 9 Okla. 569, Mr. Chief Justice Burford, speaking for the court, said:

“When the evidence is conflicting and contradictory, and there is some evidence tending to support each material allegation-necessary to sustain the verdict, and the trial court has approved the verdict by refusing to grant a new trial,, the appellate court will not disturb the judgment on the weight of the evidence.”

And in Kramer v. Ewing, 10 Okla. 357, this court again said:

' “When controverted questions of fact are submitted to a jury and the evidence reasonably tends to support the verdict, the appellate court will not disturb the verdict.”

Upon all of these controverted questions of fact, we are of the opinion that the evidence was sufficient to warrant the jury in finding for the plaintiff, and hence the verdict, and the judgment of the court rendered thereon, must be upheld by this court, unless the court erred in some matter of law prejudical to the rights of the defendant.

It is claimed by the plaintiff in error that the court erred in the instructions to the jury. It' is argued that instruction No. 7, given at the request of the plaintiff, is erroneous and misleading. This instruction is as follows:

“The court instructs you that the testimony of one credible witness may be entitled fo more weight than the testimony of many others, if, as to those other witnesses, you have reason to believe and do believe from the evidence and all the facts before you, that such other witnesses have knowingly testified untruthfully, and are hot corroborated by other credible witnesses, or by circumstances proved in the case.”

*530 No authorities are cited by counsel for plaintiff in error to support their contention that this instruction is erroneous; hut it is urged that it invades the province of the jury, and therefore was misleading and prejudicial. In our opinion, this instruction not only correctly states the law, as an abstract proposition, but was peculiarly applicable to the case, and in harmony with all the evidence. It is true that the plaintiff was contradicted by a number of witnesses, all of whom were members of the firm, or related to members of the firm, and necessarily more or less interested in the result of the action. The jury are the exclusive judges of the facts of the case, and of the credibility of the witnesses, and of the weight to be given to their testimony; and hence they have the undoubted right to give more weight and credence to the testimony of one witness than to the testimony of a number of others. And if they believe that any witness has wilfully and knowingly testified falsely as to any material matter, they are at liberty to disregard the entire testimony of such witness, unless it.is corroborated by other credible evidence. In our opinion, the court did not invade the province of the jury, and therefore there was no error in giving the instruction.

It is argued that the court erred in- giving instruction No. 3, at the request of the plaintiff, which is as follows:

“You are instructed by the court that if you find from a preponderance of all the evidence that on March 20th, 1899, plaintiff and defendant as co-sureties and the only sureties for Strickler Bros., signed the note for $2000.00 to Louis -T. Goldman, and that thereafter the said note was wholly paid out of the proceeds of the property of plaintiff and that defendant paid no part of the same, and that after the making *531 of said note plaintiff bought from J. B. Striclder his interest in the firm of Strickler Bros., you must find for plaintiff, and against defendant for an amount equal to one half of the amount paid to satisfy the said Goldman note, together with interest on -said amount of one half from the date of such payment at 7 per cent per annum, until this time, unless you further find from a preponderance of all the evidence that plaintiff at' the time of purchase of said J. B. Strickler’s interest or thereafter made a special promise to assume as a partner the indebtedness of said firm to said Goldman.”

It is contended that this instruction is not applicable to the facts in this case. We cannot concur in this. view. In our opinion, the evidence fully warranted the instruction, and it correctly states the law as applied to the evidence in this ■case, and hence was properly given by the court.

■ In our opinion, the instructions of the court fully and ■fairly-cover every proposition of law involved in this case. And there was no error in refusing to give instructions 1, 2, ■3, and 4, which were requested by the defendant.

Finding no error in the record prejudicial to the rights ■of plaintiff in error, the judgment of the district court is affirmed.