Within a decade after the Pollock decision the retreat from Collector _v._ Day began. In 1903, a succession tax upon a bequest to a municipality for public purposes was upheld on the ground that the tax was payable out of the estate before distribution to the legatee. Looking to form and not to substance, in disregard of the mandate of Brown _v._ Maryland,[230] a closely divided Court declined to "regard it as a tax upon the municipality, though it might operate incidentally to reduce the bequest by the amount of the tax."[231] When South Carolina embarked upon the business of dispensing alcoholic beverages, its agents were held to be subject to the national internal revenue tax, the ground of the holding being that in 1787 such a business was not regarded as one of the ordinary functions of government.[232] Another decision marking a clear departure from the logic of Collector _v._ Day was Flint _v._ Stone Tracy Company,[233] where the Court sustained an act of Congress taxing the privilege of doing business as a corporation, the tax being measured by the income. The argument that the tax imposed an unconstitutional burden on the exercise by a State of its reserved power to create corporate franchises was rejected, partly in consideration of the principle of national supremacy, and partly on the ground that the corporate franchises were private property. This case also qualified Pollock _v._ Farmers Loan and Trust Company to the extent of allowing interest on State bonds to be included in measuring the tax on the corporation. Subsequent cases have sustained an estate tax on the net estate of a decedent, including State bonds;[234] excise taxes on the transportation of merchandise in performance of a contract to sell and deliver it to a county;[235] on the importation of scientific apparatus by a State university;[236] on admissions to athletic contests sponsored by a State institution, the net proceeds of which were used to further its educational program;[237] and on admissions to recreational facilities operated on a nonprofit basis by a municipal corporation.[238] Income derived by independent engineering contractors from the performance of State functions;[239] the compensation of trustees appointed to manage a street railway taken over and operated by a State;[240] profits derived from the sale of State bonds;[241] or from oil produced by lessees of State lands;[242] have all been held to be subject to federal taxation despite a possible economic burden on the State.