Opinion by
Defendant is a water-power company, also called a hydroelectric company, and the sole question here is its liability for a gross income state tax on amounts received from the sale of electric current. It was formed by the consolidation of water-power companies. Neither defendant nor either of its constituent companies was chartered as an electric light company, nor engaged in electric lighting, but a part of the current sold by it is ultimately used for that purpose. The Act of May 8, 1889, P. L. 136, provides for the incorporation, inter alia, of companies for the purpose of supplying light, heat and power by means of electricity. While section 23 of the Act of June 1, of the same year, P. L. 420, 432, imposes a state tax of eight mills upon the dollar, inter alia, upon the gross receipts “from the business of electric light companies.” As to water companies the Act of July 2, 1895, P. L. 425, provides: “That corporations organized, or hereafter to be organized under the laws of this State for the purpose of supplying water power to the public, and other corporations owning or controlling water
The decision of the court was right. The power to impose a tax is given by statute and an act relating thereto embraces such subjects only as are plainly within its terms. In other words, “A tax law cannot be extended by construction to things not described as the subject of taxation”: Boyd v. Hood, 57 Pa. 98. To entitle the Commonwealth to the tax imposed, the words of the statute must be clear and unambiguous: Com. v. Brush E. L. & P. Co., 204 Pa. 249, 252; Endlich on the Interpretation of Statutes, p. 478, section 345. There is a well-marked distinction between a water-power company and an electric light company, and defendant is clearly the former and not the latter. The fact that a water company converts its power into electric current does not make it an electric light company, and it is the business of the latter that is taxed. Furthermore, “It is agreed as a fact that this corporation [the defendant] does not engage in the business of electric lighting itself, but it does sell electric current to the Edison Electric Lighting Company which sells electric current for lighting purposes in Lancaster” ; and while defendant may properly supply electric current, it has no authority to do electric lighting. Article XYI, section 6, of the state Constitution provides that, “no corporation shall engage in any business other than that expressly authorized in its charter”; and the
The assignments of error are overruled and the judgment is affirmed.