A principal meridian is a meridian used for survey control in a large region.
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Famous quotes containing the words principal and/or meridian:
“I note what you say of the late disturbances in your College. These dissensions are a great affliction on the American schools, and a principal impediment to education in this country.”
—Thomas Jefferson (17431826)
“to these
Hale dead and deathless do the women of the hill
Love for ever meridian through the courters trees
And the daughters of darkness flame like Fawkes fires still.”
—Dylan Thomas (19141953)