From All These Considerations It Follows, First, That The New Continent Possesses Spices, Aromatics, And Very Active Vegetable Poisons, Peculiar

To itself, and differing specifically from those of the Old World; secondly, that the primitive distribution of species in the

Torrid zone cannot be explained by the influence of climate solely, or by the distribution of temperature, which we observe in the present state of our planet; but that this difference of climates leads us to perceive why a given type of organization develops itself more vigorously in such or such local circumstances. We can conceive that a small number of the families of plants, for instance the musaceae and the palms, cannot belong to very cold regions, on account of their internal structure, and the importance of certain organs; but we cannot explain why no one of the family of the Melastomaceae vegetates north of the parallel of the thirtieth degree of latitude, or why no rose-tree belongs to the southern hemisphere. Analogy of climates is often found in the two continents, without identity of productions.

The Rio Vichada, which has a small raudal at its confluence with the Orinoco, appeared to me, next to the Meta and the Guaviare, to be the most considerable river coming from the west. During the last forty years no European has navigated the Vichada. I could learn nothing of its sources; they rise, I believe, with those of the Tomo, in the plains that extend to the south of Casimena. Fugitive Indians of Santa Rosalia de Cabapuna, a village situate on the banks of the Meta, have arrived even recently, by the Rio Vichada, at the cataract of Maypures; which sufficiently proves that the sources of this river are not very distant from the Meta. Father Gumilla has preserved the names of several German and Spanish Jesuits, who in 1734 fell victims to their zeal for religion, by the hands of the Caribs on the now desert banks of the Vichada.

Having passed the Cano Pirajavi on the east, and then a small river on the west, which issues, as the Indians say, from a lake called Nao, we rested for the night on the shore of the Orinoco, at the mouth of the Zama, a very considerable river, but as little known as the Vichada. Notwithstanding the black waters of the Zama, we suffered greatly from insects. The night was beautiful, without a breath of wind in the lower regions of the atmosphere, but towards two in the morning we saw thick clouds crossing the zenith rapidly from east to west. When, declining toward the horizon, they traversed the great nebulae of Sagittarius and the Ship, they appeared of a dark blue. The light of the nebulae is never more splendid than when they are in part covered by sweeping clouds. We observe the same phenomenon in Europe in the Milky Way, in the aurora borealis when it beams with a silvery light; and at the rising and setting of the sun in that part of the sky that is whitened* from causes which philosophers have not yet sufficiently explained.

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