68 NOTES ON THE 



FOOT OF THE IxTACCinrATL. Trigonometrical Station B. The barometer 2 feet above the ground. 



POPOCATEPETL. 



OBSERVATIONS or TEMPERATURE ON THE POPOCATEPETL. The observations were made at &quot; la cueva,&quot; 



in the crater. 



1 The longer cistern barometer (I.) read 506 mm .3 at temperature +9. 2 C. 

 a The cistern barometer I. read 505 mln .8 at temperature +10.0 C. 



