Ward Hunt, Welch v. Cook — Opinion of the Court
“ We shall therefore consider the question as if that act exempting manufacturing property from taxation had been passed directly by Congress. It does not create a contract in the sense that it cannot be repealed. It has been frequently held that the incorporation of a company by special charter, with the exemption of its lands or other property from taxation, creates, upon the acceptance of the charter, a contract which will insure that exemption during the period specified. But the present case does not come within that rule. This is a bounty law, which is good as long as it remains unrepealed ”
