328 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 105 



MEXICO CITY, MEXICO 



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



PRESSURE AT STATION LEVEL : COR. TO 0° C. (32= 



GRAV. AT 45° LAT. 



Means of ;U7" + 14''+21"), 90lh meridian W. 



500 mm. + 



F.) AND TO 



Mean 85.3 85.0 84.6 84.8 84.8 



84.1 



85.5 85.8 85.0 85.8 86.1 85.7 *85.3 



TEMPERATURE IN DEGREES C. 

 Means of J(7" + 14"+21") 



Mean 14.1 15.5 17.0 18.4 18.9 18.2 17.( 



17.3 16.1 



16.2 14.9 14.1 *16.6 



TOTAL PRECIPITATION IN MILLIMETERS 



Mean 4.5 4.2 11.4 12.8 51.8 90.4 129.2 119.1 106.6 23.6 9.0 5.8 |668.3 



Mean of 12 monthly means. 



t Sum of 12 monthly means. 



