The Collector v. Hubbard was a United States Supreme Court case that was decided in 1870. The case involved a dispute between the Collector of Internal Revenue and the respondent, Hubbard. The Collector had assessed a tax on Hubbard's income from the sale of certain bonds. Hubbard argued that the tax was unconstitutional because it was a direct tax and not apportioned among the states according to population. The Supreme Court held that the tax was constitutional because it was an indirect tax, not a direct tax. The Court reasoned that the tax was imposed on the income from the sale of the bonds, not on the bonds themselves. Therefore, the tax was not a direct tax and did not need to be apportioned among the states. The Court also held that the tax was not a violation of the Fifth Amendment's Takings Clause because it was imposed on the income from the sale of the bonds, not on the bonds themselves. In conclusion, the Supreme Court held that the tax imposed by the Collector of Internal Revenue on Hubbard's income from the sale of certain bonds was constitutional because it was an indirect tax, not a direct tax, and did not need to be apportioned among the states. The Court also held that the tax was not a violation of the Fifth Amendment's Takings Clause.

In The Collector v. Hubbard, the Supreme Court was asked to decide whether a tax imposed by Congress on distilled spirits was constitutional. Justice Field delivered the dissenting opinion in which he argued that Congress had exceeded its authority under the Constitution when it passed this law. He reasoned that while Congress has broad powers over taxation and commerce, these powers are limited by other provisions of the Constitution such as those protecting private property rights or prohibiting certain kinds of taxes from being levied without apportionment among states according to their population size. In his view, this particular tax did not meet either of these requirements and thus should be declared unconstitutional. Furthermore, Field argued that if allowed to stand it would set a dangerous precedent for future congressional actions since any kind of taxation could then be justified simply because it is related in some way to interstate commerce or revenue collection purposes - even if it violates other parts of the Constitution like protection for private property rights or equal representation among states through apportionment-based taxes.