Online Encyclopedia

VERTICAL (from Lat. vertex, highest p...

Online Encyclopedia
Originally appearing in Volume V27, Page 1051 of the 1911 Encyclopedia Britannica.
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VERTICAL (from Lat. vertex, highest point), the direction of the line of action of gravity, as determined by the plumb-line. The angle of the vertical is the angle between the direction of the plumb-line and that of the earth's centre (see EARTH,
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