24 Meteorological Observations made iuj ^c, 



observ 



i 



I took the following method to obtain an exponent of the 

 value in feet of each degree of the diminished temperature of 



boihng water. 



The elevation of Quito is, according to Boussingaultj 9524 ; 

 and water boils at 196^.25; 212^-196^.25 = 15^,5.9524 

 15.75=604 ft. 6. in. nearly. Neglecting the fraction as unim- ' 

 portant, I assumed 604 for the value of the degree, and began my 

 observation on the conical hill of Javirac, which backs the city, 

 and is calculated at 729 feet in height. Water boiled here by two 

 thermometers at 195^. Then 196^.25 -i- 195 = 1.25, difference 



of boiling water between the hill and the city ; and 1.25 X 604 



755 feet ; difference 26 feet. I next ascended the volcano of 

 Pichincha, and found at the foot of the crater B. W. 186^.212^ 

 186^=26^X604 = 15,730 feet; and adding 246 feet, the differ- 

 ence between this point and the summit, reckoned at 15,976, 

 There could be little error in the calculation. I next applied this 

 formula to the heights of several places calculated by Humboldt, 

 and where the heat of boiling water had been ascertained by 

 Caldas. 



Thus Bogota, height according to Humboldt - 8694 ft. 

 B. W. according to Caldas 197^.6 - - - 8712 



Difference - * - 18 

 Popayan, according to Humboldt - " - - 5S23 



B. W. 202°.21 



5922 



Difference - - - 99 

 Paste, according to Humboldt - > _ 8572 



B. W. 197°. 6 



- 8712 



Difference - - - I'iO ft. 



The differences here are in four points 27 feet^ 18, 99; 140. 

 With respect to the hill of Javirac, commonly called El Parte- 

 dllo^ I suppose the measurement to have been made by the Ac- 

 ademicians, But their calculations generally differ from those of 



case of Quito 



Humboldt 



borazo 20,583, Humboldt 21,414 But even a difference of sites 



