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Gravity Measurements and the Standards Laboratory
The local value of the acceleration due to gravity is a fundamental datum for almost every standards laboratory as it, together with accurate standards of mass, is the basis for the standards involving force.Instruments used as standards in this area include precise deadweight piston gages, deadweight calibrators for force transducers, liquid manometers, and earth field accelerometer calibrators.The practical realization of the absolute ampere and the absolute volt require a knowledge of force.The paper presents the basic information about how gravity measurements are made and outlines procedures for obtaining a suitable value for a given location.It also gives a brief discussion of the background and meaning of the term 'standard gravity', and its application in the computation of forces in units of the pound-force and the kilogram-force.(Author).
The Washingtons. Volume 4, Part 2
This is the fourth volume of Dr. Justin Glenn’s comprehensive history that traces the “Presidential line” of the Washingtons. Volume One began with the immigrant John Washington, who settled in Westmoreland Co., Va., in 1657, married Anne Pope, and became the great-grandfather of President George Washington. It continued the record of their descendants for a total of seven generations. Volume Two highlighted notable members of the next eight generations of John and Anne Washington’s descendants, including General George S. Patton, author Shelby Foote, and actor Lee Marvin. Volume Three traced the ancestry of the early Virginia members of this “Presidential Branch” back in time to...
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