. The earth and its inhabitants ... Geography. CLOSED LACUSTEINE BASINS. 47 during the Listoric i^eriod, when a city stood on an island in the central lagoon at a lower level than several of the separate basins which had formed part of the original lake, it became necessary to protect the habitations and temples from the inundations by which the lower part of the depression might have been .Fig. 23.âAkea of the Mexican Lakes at Vaeiotjs Periods. Scale 1 : 550,000. '^ 'tm--. y9°io- ^* Ayocinéo\'> ' ~1 .â â ^H . N . I? ,/Afc^^' , .^ 1520. 1600. 1700. 1865. Highest Floods. Northern Lake
. The earth and its inhabitants ... Geography. CLOSED LACUSTEINE BASINS. 47 during the Listoric i^eriod, when a city stood on an island in the central lagoon at a lower level than several of the separate basins which had formed part of the original lake, it became necessary to protect the habitations and temples from the inundations by which the lower part of the depression might have been .Fig. 23.âAkea of the Mexican Lakes at Vaeiotjs Periods. Scale 1 : 550,000. '^ 'tm--. y9°io- ^* Ayocinéo\'> ' ~1 .â â ^H . N . I? ,/Afc^^' , .^ 1520. 1600. 1700. 1865. Highest Floods. Northern Lakes in 1880. 12 Miles. liooded. The Aztecs had accordingly constructed strong defensive works, traces of which may still be seen near the cities of Ixtapalapa and Guadalupe. But these embankments at last yielded to the pressure, and under the Spanish rule the cajwtal was for a time exposed to all lacustrine floodings. Towards the beginning of the seventeenth century the situation became so dangerous that it. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Reclus, Elisée, 1830-1905; Ravenstein, Ernest George, 1834-1913; Keane, A. H. (Augustus Henry), 1833-1912. New York, D. Appleton and company
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