A Mathematical and Philosophical Dictionar is a unique sourcebook for historians of mathematics, astronomy and philosophy. It is Charles Hutton's most well-known work and widely considered to be the successor to John Harris's great Lexicon Technicum, or an Universal English Dictionary of the Arts and Sciences (1704). Originally published in two volumes in 1795-6, this expansive scientific encyclopedia contains thousands of explanations of terms and a wealth of biographical information on the major British and European scientists and philosophers. Among the biographical entries, which include detailed bibliographical descriptions, are Berkeley, Huygens, Boyle, Bacon, Gassendi, Flamsteed, Hooke, Brahe, Newton, Galileo and Halley. The many scientific terms are concisely explained and illuminated by examples and illustrations.