John Uri Lloyd

John Uri Lloyd (19 April 1849 – 9 April 1936) was an American pharmacist influential to the development of pharmacognosy, ethnobotany, economic botany, and herbalism.

He also wrote novels set in northern Kentucky. His most popular novel was the science fiction or allegorical Etidorhpa, or, the end of the earth: the strange history of a mysterious being and the account of a remarkable journey (1895). First distributed privately, it was later illustrated and printed in eighteen editions. Translated into seven languages, it was widely read in Europe as well as the United States.

John Uri Lloyd was born in upstate New York to teachers Sophia Webster and Nelson Marvin Lloyd. His family relocated to Florence and Petersburg in northern Kentucky, near Cincinnati, Ohio in 1853. Lloyd took an apprenticeship with the chemist William J.M. Gordon when he was 14 years old and later apprenticed with George Eger.

His younger brothers Nelson Ashley Lloyd (1851–1926) and Curtis Gates Lloyd (1859–1926) also became chemists. During 1886 the brothers bought the Merrell and Thorpe Company, renaming it as Lloyd Brothers, Pharmacists, Inc. John Lloyd's innovations include a "cold still" for plant extractions and the first buffered alkaloid (made with hydrous aluminium silicate), called alcresta.

During 1919 Lloyd and his two brothers established trusts to fund the Lloyd Library and Museum. Today it is considered by many to house the finest collections in the world devoted to eclectic medicine, medical botany and pharmacy. During the 19th and early 20th century, the eclectic medicine movement was popular, which incorporated the use of medical botany. It founded associated medical schools, including the Eclectic Medical Institute, first located in Worthington in 1833, which moved to Cincinnati, where it had students from 1845 to 1939.

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