Like most maps, this one has a projection, and Lambert's conformal conic is the name of the equation behind, below, and between every flattened shape on this beautiful America. It's not perfect ...

THIS book has only recently met our notice; it consists of a series of twenty-nine propositions deriving proofs of many of the chief properties of the ellipse by the method of circular projection.

equatorial region was portrayed in the Mercator projection, with Lambert Conformal Conic for the mid-latitudes and Polar Stereographic for the poles.