Antonio de Ulloa
Antonio de Ulloa (1716–1795) was a Spanish naval officer, scientist, and colonial administrator who helped introduce platinum to European science.
Jorge Juan y Santacilia: A Spanish naval officer, mathematician, and astronomer who accompanied Ulloa on the French Geodesic Mission to South America. Juan was Ulloa’s closest scientific collaborator on the expedition that brought platinum to European attention.
French Geodesic Mission to the Equator: An 18th-century expedition to present-day Ecuador that measured a meridian arc near the equator. Ulloa joined this mission as Spain’s representative alongside Jorge Juan.
Platinum: A dense, malleable chemical element with symbol Pt and atomic number 78. Ulloa described this metal, encountered in South American gold workings, to European readers.
Governorate of Louisiana: The Spanish colonial administration of Louisiana after Spain acquired the territory from France in 1762. Ulloa became Louisiana’s first Spanish governor, facing resistance to Spanish rule.
A Voyage to South America: An account of the South American expedition by Jorge Juan and Antonio de Ulloa, published in English in 1758. Its descriptions brought the expedition’s observations and Ulloa’s platinum report to a broad English-speaking public.
Charles Marie de La Condamine: A French mathematician and explorer who led part of the French Geodesic Mission to measure an arc of the meridian in Ecuador. His account helped circulate European knowledge of platinum gathered during the expedition.
Quito: The capital of Ecuador, historically a major administrative center of the Spanish Empire in South America. The expedition operated from Quito, where Ulloa observed colonial society and natural history.
Platina del Pinto: An early name for platinum, derived from its occurrence in the Pinto River region of New Granada. Ulloa’s account described the material as platina and noted its resistance to melting.
Louisiana Rebellion of 1768: An uprising by Louisiana colonists that forced Spanish governor Antonio de Ulloa to leave New Orleans. The rebellion ended Ulloa’s first attempt to establish Spanish authority in Louisiana.
Relación histórica del viaje a la América Meridional: A two-volume Spanish account by Jorge Juan and Antonio de Ulloa, published in 1748. This work preserved Ulloa’s account of the expedition and its natural and social observations.