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THE POPULAR SCIENCE MONTHLY. 



Fig. 5.— Ptbamids of San Juan Teotihuacan. 



At Papantla, in the State of Vera Cruz, is a pyramid remarkable 

 for its symmetry, built of immense stones of porphyry, regularly cut 

 and finely polished, many of which are covered with hieroglyphics, 

 with carvings of serpents and crocodiles. 



Fig. 6.— Toltec Palace at Tula. 



The Museum of the city of Mexico contains a sacrificial stone, and 

 a number of the idols of Aztec worship. We give cuts of two of 

 these idols — Quetzalcoatl, the chief god of the people, and a feathered 

 serpent. 



The Marquis de Nadaillac, who has lately reviewed the whole sub- 



