ornithologist Ezra Townsend Cresson – entomologist Peter Collinson – botanist with some interest in electricity; his family belonged to the Gracechurch meeting of the Religious Society of Friends Edward Drinker Cope – early paleontologist who took part in the Bone Wars and for whom Cope's Rule is named John Dalton – taught at a Quaker school, but is best known for work in atomic theory. Jeremiah Dixon – surveyor and astronomer known for the Mason–Dixon line Henry Doubleday – horticulturist and lace designer Arthur Stanley Eddington – astrophysicist known especially for the Eddington experiment and as a populariser of science, active in the Quaker Guild of Teachers, attended meetings regularly; his Swarthmore Lecture was titled "Science and the Unseen World" George Ellis – co-authored The Large Scale Structure of Space-Time with University of Cambridge physicist Stephen Hawking; won the 2004 Templeton Prize and got involved with the Quaker Service Fund John Fothergill – physician and botanist; Fothergilla (witch alder) is named for him Robert Were Fox the Younger – geologist active in the early days of the British Association for the Advancement of Science Ursula Franklin – metallurgist and physicist George Graham – clockmaker and geophysicist who discovered the diurnal variation of the terrestrial magnetic field John Gummere – astronomer Richard Harlan – naturalist Thomas Hodgkin – lived in the more ultra-orthodox era of Quakerism so wore plain clothes and spoke in a formal manner; Hodgkin's disease is named for him Rush D. Holt, Jr. – Congressman; former Assistant Director of the Princeton Plasma Physics Laboratory; beat Watson; has a patent for a "method for maintaining a correct density gradient in a non-convecting solar pond" Luke Howard – meteorologist known for work in cloud types and nomenclature George Barker Jeffery – known for Jeffery's equations and translating works on the theory of relativity to English; his Swarthmore Lecture was "Christ, Yesterday and Today" Isaac Lea – conchologist born a Quaker Graceanna Lewis – ornithologist and social reformer Joseph Jackson Lister – known for his role in the development of the optical microscope; his son, Joseph Lister, 1st Baron Lister, was a pioneer in surgical sterile techniques, but left the Quakers and joined the Scottish Episcopal Church Kathleen Lonsdale – prominent crystallographer; discovered the planar hexagonal structure of benzene; became a Quaker in 1935, as such, she was a committed pacifist and served time in Holloway prison during World War II