Opinion by
Smith, J.,It is well settled that, apart from the question of jurisdiction, matters merely in abatement or suspension of the action, or in denial of status as a suitor, or of obligation to appear, must be presented before the cause of action, on the one hand, or the defense, on the other, is introduced, and that objections resting on such matters are waived by any step taken for the determination of the cause on the merits: Jeannette Borough v. Roehme, 197 Pa. 280; Ins. Co. v. Storrs, 97 Pa. 354. Matters affecting the regularity of an appeal are within this rule; Wil*510son v. Kelly, 81 Pa. 411; D. & H. Canal Co. v. Loftus, 71 Pa. 418; Carothers v. Cummings, 63 Pa. 199; Sleck v. King, 3 Pa. 211.
It does not appear from the record before us whether the appeal was taken within the statutory period or not. But the plaintiff’s subsequent action has made this wholly immaterial. For nearly a year after the appeal was entered, its regularity remained unquestioned. No separate suit was brought but the first step taken by the plaintiff was the filing of a declaration in the appeal proceeding setting forth its demand. This was a recognition of the defendant’s right to trial on the merits, and called on it to reply by affidavit or in default suffer judgment. Such an affidavit having been filed, the plaintiff’s next step was a rule for judgment for its insufficiency, thus submitting the cause to the judgment of the court on the matters appearing in the declaration and reply. Upon the hearing of this rule, as we gather from the argument, the plaintiff for the first time raised the question of the regularity of the appeal, alleging that it had not been entered in time; in effect denying the defendant’s right to appear as a suitor and make defense. But if the appeal was too late, the objection based thereon was equally out of time. Such an irregularity, though ground for dismissing the appeal had the question been raised at the proper stage, could avail nothing after the plaintiff had brought the cause before the court for determination on the merits. This objection, indeed, does not appear to have been considered by the court below, since the judgment entered in the case was not a dismissal of the appeal, but an adjudication on the merits. As such, it was clearly erroneous.
With exceptions not material here, a mercantile license tax is not a tax on persons or on property, but on a particular method of transacting business. The method taxed is that practiced by dealers in merchandise ; and, under the mercantile tax laws, a dealer is one who buys and sells the products of others. The method pursued by the manufacturer who sells only his own products at the place of manufacture, or through a commission merchant, is not subject to the tax. The one is the method of a middleman, the other that of a producer. The distinctions growing out of acts of assembly on this subject are fully considered in Com. v. Gormly, 173 Pa, 586; Com. v. Potter, Sons *511& Co., 159 Pa. 583, and the cases therein referred to. The matters alleged in the affidavit of defense present the defendant as a manufacturer, selling nothing but its own products, and these only at the place of manufacture. Under the mercantile tax laws, this method of selling is not taxable.
Judgment reversed and procedendo awarded.