Benzine is a "rock or earth oil," made from petroleum.1 If a policy of insurance forbids the keeping of gasoline or benzine on the premises, authority to use gasoline gas does not warrant keeping either fluid there for any other purpose than for the manufacture of gas.2 Artificial butter made out of animal fat, milk, and other substances; imitation butter. A patentee is not authorized by the patent laws to manufacture and sell the patented article in violation of the laws of a State. Statutes prohibiting the sale of articles made in imitation and designed to take the place of genuine butter, unless the packages are so labeled or marked as to prevent deception upon those who desire to purchase butter made from cream only, are constitutional. The legislature of a State may prohibit the sale of oleomargarine, suine, and like compositions, as an exercise of the police power, q. v.¹ The New York act of 1884 was held to be unconstitutional in so far as it prohibited the making or using of any compound designed as a substitute for butter or cheese, however wholesome, and however openly and fairly the character of the substitute may be avowed. "Such enactment conflicts with the constitutional right of liberty in every citizen to adopt and follow such industrial pursuit, not injurious to the community, as he may see fit." 8 But the act of 1885, which forbids the manufacture or sale of products not made from unadulterated milk in imitation or resemblance, or designed to take the place of butter, is constitutional. It is not necessary, under the latter act, that the buyer should be deceived, or that there should be an attempt to deceive him; and evidence of the presence of unnecessary coloring matter, designed to make the oleomargarine resemble dairy butter, will justify conviction.º Buchanan v. Exchange Ins. Co., 61 N. Y. 29 (1874); Bennett v. North British Ins. Co., 81 id. 275 (1880); Morse v. Buffalo Ins. Co., 30 Wis. 534 (1872). 2 Liverpool, &c. Ins. Co. v. Gunthur, 116 U. S. 113, 126 (1885). * People v. Griswold, 67 N. Y. 61 (1876). 4 O'-le-o-mär'-ga-rine. • Re Brosnahan, 18 F. R. 62 (Mo., 1882). • People v. State, 39 Ohio St. 236 (1883); Pierce v. State, 63 Md. 592 (1885). State v. Addington, 77 Mo. 110 (1882); Commonwealth v. Powell, 1 County Ct. R. 94 (Pa., 1885). * People v. Marx, 99 N. Y. 377, 386 (1885); People v. Ahrenberg, 103 id. 388 (1886); Butler v. Chambers, 36 Minn. 69 (1886); People v. West, 44 Hun, 163 (1887), cases: Taylor v. State, Tex. Ap. (1886), cases. • People v. Arensburg, 105 N. Y. 123 (1887): 103 id. 388 (1886). The Pennsylvania act of May 21, 1885, is within the power to legislate for the public health. That some persons suffer loss from prohibiting the manufacture and sale of the substance cannot defeat the purpose of the act; nor either can the opinion of individuals that the legislature mistook the necessity for such a law. And the further fact that the pure substance may be wholesome is irrelevant in a judicial inquiry: the legislature may still restrict or prohibit traffic in the substance. If there is probable ground for believing that entire prohibition of traffic in any preparation is the only way effectually to prevent its being fraudulently substituted for the real article, then such prohibition may be upheld as a reasonable police regulation, although the preparation is in fact innocuous. On this principle, mixing milk and water, and adultering confections and provisions, have been made penal offenses.1 That statute of Pennsylvania, which was designed "to protect the public health, and to prevent adulteration of dairy products and fraud in the sale thereof," does not deny to persons the equal protection of the laws, nor deprive them of property without compensation as required by law, nor of any right of liberty or property without due process of law, - within the meaning of the Fourteenth Amendment. "The (Supreme) court is unable to affirm that this legislation has no real or substantial relation to such objects"as are expressed in the title of the act.2 An act of Congress, approved August 2, 1886 (24 St. L. 209), provides, section 1, that for the purpose of the act "butter" shall be understood to mean "the food product usually known as butter, and which is made exclusively from milk or cream, or both, with or without common salt, and with or without additional coloring matter." Sec. 2. "That for the purposes of this act certain manufactured substances, certain extracts, and certain mixtures and compounds, including such mixtures and compounds with butter, shall be known and designated 'oleomargarine,' namely: All substances heretofore known as oleomargarine, olco, oleomargarineoil, butterine, lardine, suine, and neutral; all mixtures and compounds of oleomargarine, oleo, oleomargarine-oil, butterine, lardine, suine, and neutral; all lard extracts and tallow extracts; and all mixtures and compounds of tallow, beef-fat, suet, lard, lard-oil, vegetable-oil annotto, and other coloring matter, intestinal fat, and offal fat made in imitation or semblance of butter, or when so made, calculated or intended to be sold as butter or for butter." Sec. 3. Imposes special taxes as follows: $600 upon manufacturers for sale; $480 upon wholesale dealthose wh