raldas. Their height, both above the plain of 
Quito and the seacoast, was ti igonometricaily 
measured by Bouguer ; and the French acade- 
micians determined, by the difference of height 
obtained in these two measurements, the abso- 
lute height of the city of Quito, and the ap- 
proximative value of the. barometric coefficient. 
Those natural philosophers, who interest them- 
selves in the history of the progress of the 
sciences, will rank the name of Ilinissa with that 
of the Puy-de-dome, where Perrier, following 
the advice of Pascal, attempted first to measure 
the height of niountains by the aid of a baro- 
meter. 
