Schollenberger v. Pennsylvania. Paul v. Pennsylvania. Paul v. Pennsylvania‪.‬

(1.) That oleomargarine is a newly invented or discovered article, and that each State has the right in the case of a newly invented or discovered food product to determine for its citizens the question whether it is wholesome and nondeceptive, and neither the Congress of the United States nor the legislatures of other States can deprive it of this right, and that being such newly discovered article it does not belong to the class universally recognized as articles of commerce, and hence the legislation of Pennsylvania does not regulate or affect commerce; that non-discriminative legislation enacted in good faith for the protection of health and the prevention of deception, not hampering the actual transportation of merchandise, is not presumptively void but is conclusively valid.