Espy, James Pollard, a meteorologist, born in Pennsylvania; did notable work in investigating the causes of storms, and in 1841 published “The Philosophy of Storms”; was appointed to the Washington observatory, where he carried on experiments in the cooling of gases and atmospheric expansion (1785‒1860).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Esprit des Lois * Esquire