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Striking profile of the Huehuetoca Canal in the Valley of Mexico.

The map diagrams the drainage project and the function of the canal in preserving the Valley of Mexico.  The image is drawn from illustrations by Don Ignacio Castera and Don Luis Martin and illustrates the sectional view of the canal constructed to safeguard Mexico City from the persistent peril of floods. This pragmatic depiction, rooted in the scientific inquiry of the age, embodies the enlightened approach to civil engineering and hydrological challenges faced by urban centers in the colonial New World. 

Condition Description
Some discoloration and signs of previous fold at center.