266 



Statistical IRotcs on 



FROM TEHUACAN TO OAXACA AND PUERTO ANGEL BY WAGON ROAD. 



THE VALLEY OF MEXICO'S DRAINAGE. 1 



Mexico is finishing a great work, the drainage of the valley where 

 the capital city is located, which has required for its completion nearly 

 three hundred years and many millions of dollars, and has cost the 

 lives of hundreds of thousands of men. The necessity, importance, 



1 This article was published in the Engineering Magazine of New York for 

 January, 1895 (vol. viii., No 4), but has since been revised and considerably enlarged. 



