Ev´ansville, a town in the United States, in Indiana, pleasantly situated on a height above the Ohio. It contains some handsome buildings, including custom-house and post office. Coal and iron abound in the vicinity, and there are numerous factories, flour-mills, and iron-foundries, and a large shipping trade. Pop. 85,264.
Evaporation, the process of changing a liquid into vapour, which goes on at the surface of the liquid. When evaporation takes place into a closed space above the liquid, a state is reached in which the space is saturated with vapour, and no further change is apparent. Certain conditions influence the rate at which evaporation takes place in the open, such as the extent of the exposed surface, the dryness, pressure, and temperature of the air, and the presence or absence of wind. The farmer looks for a drying wind to dry his corn-sheaves before they are carted from the field. Evaporation is always accompanied by an absorption of heat by the vapour, namely the latent heat necessary for the change of state from liquid to vapour. This heat is abstracted from the liquid, which, as a consequence, falls in temperature, and neighbouring bodies may also be cooled. A bather emerging from the water experiences this cooling as the water evaporates from his skin. In hot countries, water is kept cool by being placed in porous earthenware jars: the evaporation which takes place at the outer surface prevents the water in the jar from becoming too warm. The continual evaporation from land and water surfaces is the cause of the presence of water in the atmosphere, whether in the form of invisible vapour or of cloud, mist, fog, rain, hail, or snow. The cooling caused by evaporation is applied in industry in the case of the ammonia compression machine, in working refrigerating plant for the preservation of food-stuffs, and in the manufacture of artificial ice. When evaporation takes place at the surface of a dry solid, the process is called sublimation, and it may be observed in the cases of iodine, camphor, and ice.
Ev´elyn, John, an English writer of the seventeenth century, born at Wotton, in Surrey, 31st Oct., 1620, died there, 27th Feb., 1706. After completing his course at Oxford, he studied law at the Middle Temple, visited various parts of the Continent, and in 1659 prepared the way for the Restoration. He published numerous works, amongst which are: Sculptura, or the History and Art of Chalcography; Sylva, or a Discourse of Forest Trees; treatises on gardening and architecture. But by far his most important work is his memoirs, comprehending a diary and correspondence, which are interesting contributions to the history of the time. Evelyn's Diary was first published in 1818, and an edition by Austin Dobson appeared in 1906.—Cf. H. Maynard Smith, The Early Life of John Evelyn.
Evening-primrose, Œnothĕra, a genus of plants, nat. ord. Onagraceæ. Œ. biennis, an American species common in cottage gardens, is not infrequent as an escaped plant in England.
Ev´erest, Mount, the highest summit of the Himalayas and the loftiest mountain in the world, 29,002 feet. It was named after Sir George Everest (1790-1866), chief of the great Indian trigonometrical survey and Surveyor-General of India. In 1921 an expedition set out to climb the mountain.
Ev´erett, Alexander Hill, an American diplomatist, born at Boston in 1792, died at Canton in 1847. After studying at Harvard, in 1809 he accompanied John Quincy Adams to St. Petersburg (Petrograd) as Secretary of Legation. He afterwards filled successive diplomatic posts in
the Netherlands, Spain, and elsewhere. He was the author, amongst other works, of Europe, or a General Survey of the Present Situation of the Principal Powers (1822); and a similar work on America.
Everett, Edward, an American statesman and author, brother of the preceding, born at Dorchester, Massachusetts, 11th April, 1794, died at Boston, 15th Jan., 1865. After travelling for some years in Germany and England, he returned to America in 1819 to occupy the chair of Greek literature at Harvard. He became editor of the North American Review, and entering the political world became successively member of Congress, Governor of Massachusetts, and Minister Plenipotentiary in England (1841-5). In 1845 he was appointed president of Harvard College; in 1852 Secretary of State; in 1853 a Senator. He wrote poems; a Defence of Christianity, and his speeches and orations have been published.
Evergreen, a plant that retains its verdure through all the seasons, as the fir, the holly, the laurel, the cedar, the cypress, the juniper, the holm-oak, and many others. Evergreens shed their old leaves in the spring or summer, after the new foliage has been formed, and consequently are verdant through all the winter season. They form a considerable part of the shrubs commonly cultivated in gardens, and are beautiful at all seasons of the year.
