Article one, section eight, hut, hut, hut

Article 1 section 8 of the constitution says that “…all Duties, Imposts, and Excises shall be uniform throughout the United States.”  Can you tell me the Supreme Court case where they tried to interpret the meaning of Uniform as used here?

I’m not a lawyer, but the double espresso I just drank has given me the fortitude to take this snap: I would refer you to Knowlton v. Moore 178 U.S. 41 (1900).