Summary

Mahlon Pitney United States v. Shelley — Opinion of the Court

But it is not so easy to believe, in the absence of clear language requiring such a construction, that in prescribing a revenue tax upon the manufacture of opium for smoking purposes, it intended to subject the same substance more than once to the tax, or to require surveillance over opium-smoking resorts,-in which, it would seem, such treatment of the residuum might most readily be conducted,-the same as over a factory or other establishment where the primary conversion of crude opium into smoking opium is conducted.
Source: Wikisource

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