gg NOTESONTHE 



Foot of the Ixtaccihuatl. Trigonometrical Station B. — The barometer 2 feet above the ground. 



Popocatepetl. 



Observations of Temperature on the Popocatepetl. — The observations were made at "la cueva," 



in the crater. 



^ Th-e longer cistern barometer (I.) read 506"™. 3 at temperature +9°. 2 C. 

 ° The cistern barometer I. read 505™". 8 at temperature +10.0 C. 



