Antonio de Ulloa (1716–95) was a Spanish scientist and mathematician. In 1734 he was asked by Philip V of Spain to join the French geodesic expedition to measure the circumference of the Earth at the equator, and accordingly in 1735 Ulloa and his fellow scientist Jorge Juan y Santacilia (1713–73) travelled to South America, staying until 1744. These two volumes contain the English translation of Ulloa's account of South America, first published in 1758. The work was very popular, producing five subsequent editions: this reissue is of the fourth edition of 1806. It provides valuable insights into the social, religious and economic institutions of colonial South America. Volume 1 includes an ethnological discussion of the indigenous people in Quito, and Volume 2 contains detailed descriptions of the cities and provinces of Lima, Concepción (in Chile) and Buenos Aires.