Mexico and the United States; a study of subjects affecting their political, commercial, and social relations, made with a view to their promotion: . eat deal to solve it. Since his day the area of the lakes hasbeen gradually diminishing. The rapid evaporation in the rarefied airand under the direct sun of the valley partly accounts for this. Twicethe water in Lake Texcoco has almost entirely disappeared, leavingonly a sea of mud and a small pool. The great problem which theMexican Government has now solved is not how to prevent an inflowof water, but how to provide an outlet for sewage. The d
Mexico and the United States; a study of subjects affecting their political, commercial, and social relations, made with a view to their promotion: . eat deal to solve it. Since his day the area of the lakes hasbeen gradually diminishing. The rapid evaporation in the rarefied airand under the direct sun of the valley partly accounts for this. Twicethe water in Lake Texcoco has almost entirely disappeared, leavingonly a sea of mud and a small pool. The great problem which theMexican Government has now solved is not how to prevent an inflowof water, but how to provide an outlet for sewage. The danger tobe averted was not that of drowning, but that of dying from the plague. Lake Texcoco more than any other now menaces the security of thecapital. The unwise cutting down of forests since the Spanish con-quest permits the waters pouring down into the valley to bring withthem annually great quantities of alluvial matter, which have so muchraised the lake bottom and the water level that inundations have beenof frequent occurrence. The general level of the City of Mexico isonly feet above the surface of the lake. The rainy season lasts. MAP OF THE OF MEXICO, SHOWING THK CANAL AND TUNNEL. Ubc IDallei? ot /IDejicos Brainaoe. 275 from June to October inclusive. During this season five times asmuch water falls as during the rest of the year, evaporation can nolonger compensate for rainfall, and the valley is more or less flooded. Originally built in the midst of a lake, the city has been left on dryground by the receding waters. Lakes Chalco and Xochimilco havealtitudes nearly four feet greater than the pavement of the more imperiously do the lakes to the north dominate the Cristobal and Xaltocan are about five feet, while Zumpango isover thirteen feet, above it. The project now almost completed is a modification of the schemeprojected by Simon Mendez in the time of the Spanish Government,and which in 1849 was adopted by Captain Smith of the c
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