the mines of New Spain, I may be permitted here to enumerate all
the works which I have hitherto published conjointly with M.
Bonpland. When several works are interwoven in some sort with each
other, it may perhaps be interesting to the reader to know the
sources whence he may obtain more circumstantial information.

1.I.1. ASTRONOMICAL OBSERVATIONS, TRIGONOMETRICAL OPERATIONS, AND
BAROMETRICAL MEASUREMENTS MADE DURING THE COURSE OF A JOURNEY TO
THE EQUINOCTIAL REGIONS OF THE NEW CONTINENT, FROM 1799 TO 1804.

This work, to which are added historical researches on the position
of several points important to navigators, contains, first, the
original observations which I made from the twelfth degree of
southern to the forty-first degree of northern latitude; the
transits of the sun and stars over the meridian; distances of the
moon from the sun and the stars; occultations of the satellites;
eclipses of the sun and moon; transits of Mercury over the disc of
the sun; azimuths; circum-meridian altitudes of the moon, to
determine the longitude by the differences of declination;
researches on the relative intensity of the light of the austral
stars; geodesical measures, etc. Secondly, a treatise on the
astronomical refractions in the torrid zone, considered as the
effect of the decrement of caloric in the strata of the air;
thirdly, the barometric measurement of the Cordillera of the Andes,
of Mexico, of the province of Venezuela, of the kingdom of Quito,
and of New Grenada; followed by geological observations, and
containing the indication of four hundred and fifty-three heights,
calculated according to the method of M. Laplace, and the new
co-efficient of M. Ramond; fourthly, a table of near seven hundred
geographical positions on the New Continent; two hundred and