This U.S. state stretches from 19 to 22 degrees north latitude, making it the southernmost in the U.S.
There are 89 integral (whole degree) circles of latitude between the 
equator ... North American nations and states have also mostly been created by 
straight .... Parallels make convenient borders in the northern hemisphere 
because... [DOC] [TLE] MasonDixon line - Wikipedia [PAR] The MasonDixon line, also called Mason's and Dixon's line, was surveyed 
between 1763 and 1767 by Charles Mason and Jeremiah Dixon in the resolution 
of a border dispute involving Maryland, Pennsylvania, and Delaware in Colonial 
America.