474 



METEOROLOGY. 



Month. 



January . . 

 February . 



March 



April 



May 



June 



July 



August ... 

 September 

 October.. - 

 November. 

 December. 



Mean tem- 

 perature. 



69.28 

 68.36 

 69.44 

 75.01 

 73. 88 

 72.41 

 72. 32 

 72. 62 

 75.50 

 72.10 

 70.19 

 70. 37 



Mean at- 

 mos. pres. 



Inches. 

 26. 960 

 26.971 

 26. 954 

 26. 964 

 26. 984 

 26. 975 

 26. 980 

 26. 964 

 26. 956 

 26. 946 

 26. 938 

 26. 959 



Humidity, 

 Saussure's 



71,64 

 66.00 

 72. 70 

 73.10 

 68.00 

 68.65 

 72. 80 

 75.90 

 76. 40 

 76.90 

 76.50 

 73.85 



Amount of 

 rain.* 



Inches. 

 0. 158 

 0. 000 

 0, 670 

 3. 349 

 0. 473 



3. 664 



4. 452 

 4.373 

 8.116 



5. 595 

 3.791 

 0. 083 



* In French inches. 



The correct mca:i annual temperaturet is therefore 71°.71, and the mean 

 annual barometric pressure 26^^^.963 ; the average degree of humidity 72°. 70, and 

 the total amount of rain in 1860, 34.724 inches. The following diagrams show 

 the annual march of the temperature and barometric pressure, as obsei'ved in 

 1860: 



Montldy mean temperature at Caracas in 1860. 



Monthlij mean harometer pressure at Caracas in 1860. 



Inches. 

 26. 090 



.£85 



.983 



.970 

 .965 

 .960 



.950 

 .945 

 .940 

 .935 



^ > a 

 o O i 



o !?: <a 



t Seo Appendix B. 



