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Location of Jefferson County in West Virginia. This is a list of the National Register of Historic Places listings in Jefferson County, West Virginia.. This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Jefferson County, West Virginia, United States.
The vacuum magnetic permeability (variously vacuum permeability, permeability of free space, permeability of vacuum, magnetic constant) is the magnetic permeability in a classical vacuum. It is a physical constant , conventionally written as μ 0 (pronounced "mu nought" or "mu zero").
There are listings in every one of West Virginia's 55 counties. Listings range from prehistoric sites such as Grave Creek Mound , to Cool Spring Farm in the state's eastern panhandle, one of the state's first homesteads, to relatively newer, yet still historical, residences and commercial districts.
Cold Spring (Shepherdstown, West Virginia) Edward Colston House; Contentment (Ansted, West Virginia) Cook House (Parkersburg, West Virginia) Cool Spring Farm (Charles Town, West Virginia) Cool Spring Farm (Gerrardstown, West Virginia) Henry Cooper House; Cooper's Rock State Forest Superintendent's House and Garage; Couch-Artrip House; Cox ...
Early instances of western Virginia plantations with grand homes include the John Ariss-designed Harewood (1774) for George Washington's brother Samuel Washington and Happy Retreat (1780) built by Washington's younger brother Charles Washington, both of which are located near Charles Town in present-day Jefferson County.
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A practical unit for permeability is the darcy (d), or more commonly the millidarcy (md) (1 d ≈ 10 −12 m 2). The name honors the French Engineer Henry Darcy who first described the flow of water through sand filters for potable water supply. Permeability values for most materials commonly range typically from a fraction to several thousand ...