VOLCANO POPOCATEPETL AND ITS VICINITY. 



67 



TOWN OF AMECAMECA, Public Square [Plaza]. Barometer 2 feet above the ground. Observer A. SONNTAC; 



RANCUO TLAMACAS. The barometer 2 feet above the ground. Observer A. SONNTAG. 



1 Station A is 8 metres above the Indian huts. 



a This is the highest point of the road, and at the same time the lowest point of the summit of the 

 ridge, which connects the Popocatepetl and Istaccihuatl. 



