Jn. the 10th letter of the Roman alphabet ; Jn. a unit of electrical energy equal to the work done when a current of one ampere passes through a resistance of one ohm for one second ; J particlen. a neutral meson with a large mass ; J. B. Rhinen. United States parapsychologist (1895-1980) ; J. B. S. Haldanen. Scottish geneticist (son of John Haldane) who contributed to the development of population genetics ; a popularizer of science and a Marxist (1892-1964) ; J. C. Maxwelln. Scottish physicist whose equations unified electricity and magnetism and who recognized the electromagnetic nature of light (1831-1879) ; J. Craig Ventnern. United States geneticist who published the complete base sequences for all the genes of a free-living organism, the influenza bacterium ; later led team that developed a first draft of the entire human genome (born in 1946) ; J. D. Salingern. United States writer (born 1919) ; J. E. Johnstonn. Confederate general in the American Civil War ; led the Confederate troops in the West (1807-1891) ; J. Edgar Hoovern. United States lawyer who was director of the FBI for 48 years (1895-1972) ; J. J. Hilln. United States railroad tycoon (1838-1916) ; J. M. Barrien. Scottish dramatist and novelist ; created Peter Pan (1860-1937) ; J. M. Syngen. Irish poet and playwright whose plays are based on rural Irish life (1871-1909) ; J. P. Morgann. United States financier and philanthropist (1837-1913) ; J. R. Firthn. English linguist who contributed to linguistic semantics and to prosodic phonology and who was noted for his insistence on studying both sound and meaning in context (1890-1960) ;
