790 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 79 



MEXICO CITY, MEXICO 



Lat. 19° 26' N. Long. 99° 8' W. Hb = 2,259 m. 

 PRESSURE AT STATION: REDUCED TO 0° C. AND TO GRAY. AT 45° LAT. 



Means of i(7''+ 14" + 21") 

 500 mm.+ 



M'ns 85.1 84.8 84.6 84.5 84.5 84.6 85.4 85.3 84.9 85.1 85.5 85.3 84.9 



