778 



sun measured at different hours by the thermo- 

 meters placed in the shade, and in the sun j 2d. 

 on the horary variations * of the barometer; 

 3d. on the hygrometric electric, and cyano- 

 metric state J of the atmosphere ; 4th. on eva- 

 poration ; 5th. on the quantity of rain that falls 

 in different months ; 6th. on the declination 

 and inclination of the loaded needle and on 

 the intensity of the magnetic force ; 7th. on 

 the mirage, and the influence which the rising 

 and setting of the sun exerts on the inflexion of 

 the trajectories ||. The preceding volumes con- 

 tain a great number of the results which I ob- 

 tained ; I shall here treat specially of the dis- 

 tribution of heat in the different months of the 

 year, and of the hygrometric, cyanometric, and 

 electric state of the air of Cum an a. The expe- 

 riments I made on the evaporation and inten- 

 sity of the heat of the solar rays, will be deve- 

 loped later, and will serve as a term of compa- 

 rison in the statement of the meteorological phe- 

 nomena observed on the back of the Cordilleras 

 of Quito and Mexico. I made observations at 

 Cumana, with the thermometer, the whalebone 



* L. c. Vol. vi, p. (661-770). 



+ Vol. ii, p. 91 ; Vol. iii, p. 54 5 Vol. iv, p. 145. 



% L. c. Vol. ii, p. 95, 109 ; Vol. iii, p. 456. 



§ Vol. iii, p. 322—325. 



|| Vol. iii, p. 542—554. 



