■' Antonio Álzate, n 373 



"peratures are nearly always those whícli we already have 

 mentioned (20° to 24° centigrades) — This second period ter- 

 minates in the months o£ September or October. 



The especial characteristic of tliese vains during the se- 

 cond period is the followiug: 3 or 4 days without raining pass 

 and iu the space of a month, falls 3 or 4 deluges of 30 or 40 

 miHmeters (1 inch 8 or 1.57 inch) by the rain-gauge. In Sep- 

 tember and October take place the most copious and violents 

 rains of the year which some times pass 40 milimeters aud 

 generally come from the N.E. 



These are the monthly averages of the quantity of rain- 

 fall which have been deduced in México from more than 19 

 years of observations and in Tacubaya from 10 years of ob- 

 servations, 



México. Tacubaya. 



January 0.19 inch 0.09 inch 



February 0.22 0.21 



March 0.61 0.58 



April 0.58 0.46 



May 2.01 1.90 



June — 4.08 5.34 



July 4.10 4.23 



August 4.85 5.51 



September 3.98 5.05 



October. 1.71 2.46 



November 0.44 0.49 



liecember . . 0.15 0.15 



Mean annual average 22.898 inch 26.909 



This gives one excess of 407 inch more in Tacubaya than 

 in México. 



So that these numbers indicate something respecting the 

 greater abundance of rain in elevated regions of the S.W. as 

 it is seen that Tacubaya is in this direction from the capital 

 and more elevated than the latter. Also the following taken 



