Second Principal Meridian

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The Second Principal Meridian coincides with 86° 28' of longitude west from Greenwich, starts from a point two and one half miles west of the confluence of the Little Blue and Ohio rivers, runs north to the northern boundary of Indiana, and, with the base line in latitude 38° 28' 20", governs the surveys in Indiana and part of those in Illinois.

[edit] Source

• Raymond, William Galt (1914). Plane Surveying for Use in the Classroom and Field (via Google Books), New York: American Book Company.