The defendant admitted the failure of its train to stop within 800 feet and more than 200 feet from the crossing, and interposed the defense that the engineer 1. crossing: failure to stop. in charge did all lie could to stop it, but that, owing to the brakes not working in' the usual manner, the momentum of the train carried it over the crossing. The court submitted the case to the jury on the theory that the burden of proof was on the defendant, in order to exonerate itself from liability, to show by a preponderance of evidence that the failure to stop was not due to any negligence on the part of its employes in operating the train, or of the company in not having proper appliances, or in keeping those had in proper condition, and that the company might be liable even though the engineer was not. Possibly that should have been the law, but it was not so written by the legislature. The statute in question reads: “All trains run upon any rail*24road in this state which intersects or crosses any other railroad on the same level shall be brought to a full stop at a distance of not less’ than two hundred and not more than eight hundred feet from the p>oint of intersection or crossing, before such intersection or crossing is passed, except as otherwise provided in this chapter. Any engineer, violating the provisions of this section shall forfeit one hundred dollars for each offense, to be recovered in an ac-' tion in the name of the state for the. benefit of the school fund, and the corporation on whose road the offense is committed shall forfeit the sum of two hundred dollars for each offense to be recovered in like manner.” Section 2073, Code. The latter part of the statute is purely penal in character, witli the evident object of punishing the offender, rather than afford a remedy for the wrongful act. In this respect it differs radically from provisions awarding damages flowing from certain acts, such as the setting out of fire. Its meaning, then, cannot be extended beyond the terms employed. But one offense is denounced by it, and that is the omission of the engineer to stop the train as required. The first sentence commands what shall be done — -defines a duty; the first clause of the second sentence imposes a penalty on any engineer for “each offense” of omitting such duty; the second clause of the second sentence adds a penalty against the corporation “on whose road «such offense is committed.” To what do these last words refer? Manifestly, to the offense of which the engineer is guilty. No other is mentioned in the section. The statute cannot be fairly read otherwise. The thought seems to have been that, as the engineer controls the train, the fault in failing to stop as required is primarily his, and secondarily that of the company for which he acts. .There is no ground for holding that the company may be liable independent of any fault of the engineer. The forfeiture of the corporation is made to depend upon his guilt of the offense defined, and upon that only,
*25II. As the statute is purely penal in character, it ought not to be construed as fixing an absolute liability. A failure to stop may sometimes occur, notwithstanding
3 Intent the utmost efforts of tbe engineer. In such / even this omission cannot be regarded as unlawful. The law never designs the infliction of punishment where there is no wrong. The necessity of intent of purpose is always to be implied - in such statutes. An actual and conscious infraction of duty is contemplated. The maxim, “Aotus non facit reum nisi mens sit rea,” obtains in all penal statutes unless excluded by their language. See Regina v. Tolson, 23 Q. B. Div. 168, where i.t was said, “Crime is not committed where the mind of the person committing the act is innocent.” See, also, Sutherland on Statutory Construction, section 354 et seq. No doubt many statutes impose a penalty regardless of the intention of those who violate them, but these ordinarily relate to matters which may be known definitely in advance. In such cases commission of the offense is due to neglect or inadvertence. But even then it can hardly be supposed the offender would be held if the act were committed when in a state of somnambulism or insanity. As it is to be assumed in the exercise of the proper care that the engineer has control cf his train at all times, proof of the mere failure to stop makes out a prima fade case. But this was open to explanation, and if, from that given, it was made to appear that he made proper preparation, and intended to stop, and put forth every reasonable effort to do so, he should be exonerated. See Furley v. Ry. Co. 90 Iowa, 146.
This, however, did not shift the burden of proof. It was still on the state to show that the offense had been committed (see Chaffee v. U. S., 18 Wall. 517, 21 L. Ed. 3 burden of proof. 908); not, however, by proof beyond a reasonable as contended by appellant. Suit for a penalty is by ordinary proceedings, and the general *26rules prevailing in civil actions should govern. Ordinarily, a party to succeed must establish the averments of his petition by a preponderance of evidence only. There are exceptions in equitable actions, in which clear and satisfactory evidence is required for the reformation of an instrument and the like, but we now recall no instance of an action to be prosecuted by ordinary proceeding in which more than a bare preponderance of the evidence is exacted. McAnnulty v. Seick, 59 Iowa, 586; Coit v. Churchill, 61 Iowa, 296; Truman v. Bishop, 83 Iowa, 697; Callan v. Hanson, 86 Iowa, 420; Jamison v. Jamison, 113 Iowa, 720. Even though a criminal act be the basis of recovery, the same rule obtains. Welch v. Jugenheimer, 56 Iowa, 11; Riley v. Norton, 65 Iowa, 306. An action for a penalty or forfeiture should form no exception to the rule. A civil liability only is involved, and none of the reasons for exacting full proof, save the imputation of wrongdoing as in a criminal action, obtain. People v. Briggs, 114 N. Y. 56 (20 N. E. Rep. 820); Hitchcock v. Munger, 15 N. H. 97; State v. Kansas City, etc., R. Co., 70 Mo. App. 634; Hawloetz v. Kass, (C. C.) 25 Fed. Rep. 765; 16 Ency. P. & P. 295. As said in the first of the above cases: “The purpose of the action is not the punishment of the defendant in the sense legitimately applicable to the term, but such action is brought to recover the penalty as a fixed sum by way of indemnity to the public for the injury "suffered by reason of the violation of the statute. The effect is merely to charge the defend ant with pecuniary liability, while a criminal prosecution is had for the purpose of punishment of the accused.” Chaffee v. U. S., 18 Wall. 516 (21 L. Ed. 908), is sometimes cited to the contrary, and seems to have been relied on in reaching the conclusion that the intensity of proof should be beyond a reasonable doubt in Gulf, etc., R. Co. v. Dwyer, 84 Tex. 195 (19 S. W. Rep. 470); but, as pointed out in Hawloetz v. Kass, supra, that question does not *27appear to have been considered. See, also, Riker v. Hooper, 35 Vt. 457 (82 Am. Dec. 646). The weight of authority is with our conclusion that the right to recover may be established by a preponderance of the evidence.
Appellant questions the constitutionality of the statute in so far as it imposes a penalty upon the corporation for an offense of the engineer. As we understand the 4. Constitutionality of statute. argument, it is that the legislature has no ’ . power to enact a statute punishing one person for an offense committed by another. Such is not the purport of this statute, however. The engineer is a mere employe or agent of the corporation. He is selected by it for this position of great responsibility in the operation of its property, and is under its directions. The statute exacts of the corporation the duty of seeing to it that such employe or agent do this in obedience to the statute, and on failure to do so inflicts a penalty, not alone for the omission of the engineer, but for its failure to compel the proper discharge of his duty. Other errors assigned will not be likely to arise on another trial. — ReveRSed.