Brewer, Warden v. Williams, 430 U. S. 387; Jones, Director, Department of Weights and Measures, Riverside County v. Rath Packing Co., 430 U. S. 519; Mitchell v. United States, 430 U. S. 945; Florea et al. v. United States, 430 U. S. 945; Allen et al. v. Austin, Secretary of State of Michigan, et al., 430 U. S. 924; and Caplan v. Howard et al., 430 U. S. 932