New York ex rel Cornell Steamboat Company v…
“ It is contended that as the business of towing carried on by the plaintiff company is done upon the navigable waters of the United States, and under authority of a license granted by the United States, the state has no jurisdiction or authority to levy the tax in question, and that it is in reality and substance an attempt to enforce a license tax for the privilege of navigating the public waters of the United States,-a privilege already granted under the general government. ”
