Astorga.
Astronomy, study of.
Atabapo, the: pure waters of the. banks of the.
Ataripe, cavern of.
Atlantic: temperature of the. currents in the. phenomena, in the.
Atlantis.
Atmosphere: rapid changes in the. serenity of the. greatest heat of the. observations on the.
Atmospheric transparency, effects of, on mental and vegetable properties.
Atrato.
Aturajos, country of the.