California v. San Pablo and Tulare R. Co.

From Conservapedia

In California v. San Pablo & Tulare R. Co., 149 U.S. 308, 13 S. Ct. 876, 37 L. Ed. 747 (1893), the U.S. Supreme Court held that federal courts lack power to render a decision when the question sought to be adjudicated has been mooted by subsequent developments.