A landmark decision of the U.S. Supreme Court upholding the constitutionality of racial segregation laws for public facilities if the segregated facilities were equal in quality. It's widely regarded as one of the worst decisions in U.S. Supreme Court history.
Under the Treaty of Paris, Puerto Rico is ceded by the Spanish to the U.S. at the end of the Spanish-American War.
The Public Service Corporation (PSC) was formed on May 6, 1903. The company began as a merger of a power company with four different trolley companies. PSC would ultimately combine with over 400 other companies.
Spanish (Díaz): patronymic from the medieval personal name Didacus ( see Diego ).