Memorias de la Sociedad Científica 



to April and on ocasión until the month of May, the valley 

 o£ Davos is covered by the snow, wich reaches some times 

 more than a meter an depth, and even two meters 19 centi- 

 meters (February the S'"-, 1892). Q) 



"The period o£ melting of the snow, which commences 

 towards the month o£ March, is a very disagreeable time and 

 much dreaded by the guests o£ Davos'' (Moeller). 



And nevertheless in Summer the thermometer rises to 

 near 30° cent (27° 8 cent. = Fahr 82° 2). 



The results which the Meteorológica! Observatories of 

 the Valley of México gives, are very distincts. After twenty 

 one years of continual observations, acoording to the Central 

 Meteorological Observatory, the average annual temperature, 

 is: 15°5 cent. (59°9 Fahr). The average of the lowest has 

 been 6°5 cent. (42°6 Fahr.) an the very lowest observed on 

 one solé occasion during so long a period of time has been 

 — 1°7 (2809 Fahr). The average máximum has been 25^4 

 cent. (77°7 Fahr), and the highest máximum (máxima maxi- 

 morum) Sl^S (89^2 Fahr). This Observatory and that of the 

 Tucubaya, whose observations differ very little, (one tenth 

 of a degree), are situated near the extreme S. W. of the abo- 

 ve mentioned Valley, and at an altitude above sea-level of 

 2256 meters (7404 feet. Central Observatory). The Tacubaya 

 Observatory is at 2322 meters (7618 feet). In the extreme N. 

 E. of the same Valley and placed upon the declivities of the 

 cordilleras which surronnd it, on this side is the Meteorologi- 

 cal Observatory of the city of Pachuca from the first mention- 

 ed ones 80 kilometers (50 miles). This observatory is situa- 

 ted at 2424 meters altitud (7956 feet). At this point the ob- 

 servations made in the year 1896, ofEered us an annual avera- 

 ge of 14P1 cent. (57°4 Fahr.) The máximum and minimum 



(1) Eevue des Questions Scientifiques— tome V. — Avril, 1894. "Da- 

 vos" by Dr. Moeller. 



