South Hadley

South Hadley residential town (1990 pop. 16,685), Hampshire co., W Mass., on the Connecticut River near the Holyoke Range; settled 1684, inc. 1775. Its paper industry dates from the early 19th cent. Electronic equipment, machinery, metal stampings, and concrete products are also made, although the area has suffered from a decline in manufacturing. The first navigable canal in the United States began operation there in 1795. Mount Holyoke College is in South Hadley.

Hadley circulation The movement of air from the equator towards the poles in a planet's atmosphere. Warm air near the equator rises and travels towards the poles, cooling as it does so until it becomes denser than the air below. It then sinks to the surface and returns to the equator, completing a cycle known as a Hadley cell. The tropical Hadley cells in the Earth's atmosphere extend to about 30° north and south of the equator, but there are two further sets of Hadley cells, one between 30° and 60° latitude, and another between 60° latitude and the poles, which are less prominent and less permanent than the tropical ones. On Venus, there is a single Hadley cell extending from the equator to the poles. The effect is named after the English meteorologist George Hadley (1685–1768).

U.S. Midshipmen's School a school begun at Smith College and the Hotel Northhampton in Northhampton, Massachusetts (later branching out to Mount Holyoke College in South Hadley, Massachusetts). It trained more than 9000 women for the WAVES officers program beginning in 1942.