Ulloa, Don Antonio

, a celebrated Spanish mathematician, and a commander of the order of St. Jago, was born at Seville Jan. 12, 1716. He was brought up in the service of the royal marines, in which he at length obtained the rank of lieutenant-general. In 1735 he was appointed, with Don George Juan, to sail to South America, and accompany the French academicians who were going to Peru to measure a degree of the meridian. On his return home in 1745, in a French ship, he was taken by two English vessels, and after being detained some time at Louisbourg in Cape Breton, was brought to England, where his talents recommended him to Martin Folkes, president of the Royal Society, and he was the same year elected a member of that learned body. On his return to Madrid he published his “Voyage to South America,” which was afterwards translated into German and French. There is also an English translation, in two vols. 8vo, 1758, but miserably garbled and inaccurate. In 1755 he made a second voyage to America, where he collected materials for another work, which however did not appear until 1772, under the title of “Entretenimientos Physico-historicos.” He travelled afterwards over a considerable part of Europe to collect information respecting such improvements in arts and manufactures as might be serviceable to Spain, and was the means of introducing many which had not before been known in Spain, or very imperfectly carried on. He died on July 5, 1795. There are a few of his papers in the “Philosophical Transactions.2