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Boundaries

due south at the head waters of the Mississippi; thence along the
middle or centre of the main channel of that river to latitude
forty two degrees and thirty minutes north; thence due
East to the place of beginning. It therefore embraces all
that portion of the United States lying between the State of Michigan
on the east, and the Mississippi on the West, which separates
it from the Territory of Iowa; and between the State of Illinois
on the south and the British possessions on the north; extending
from forty=two and a half to the forty ninth degree of north
latitude, and embracing about the degrees of longitude.
Taking the length of a degree of latitude and longitude in this
part of the globe, it is ascertained that Wisconsin is about
five hundred and fifteen miles from east to west; and
four hundred and forty nine miles from north to south
measuring from the extreme points. But the average
or mean extent of the Territory in longitude is only about
four and one third degrees or two hundred and six or
seven miles, showing a superficial area of about