346 



and throw it off by radiation. The influence of 

 a sky veiled by vapours is manifest in the stripe 

 of the shore of Peru, where no rain ever falls, 

 and the Sun, during a great part of the year, at 

 the period of the garua (fog), displays itself to 

 the naked eye like the disk of the Moon. Be- 

 tween the parallels of ten and twelve degrees of 

 south latitude, the mean temperature is scarcely 

 more elevated than at Algiers and Cairo*. It 



* The following are the differences observed in the places 

 at unequal distances from the equator, such as I have marked 

 them in degrees of the centigrade thermometer, in the table 

 of the climates of America. (See my work De Distributione 

 Geogr. Plant arum Secundum Cceli Temperiem et Alt. Mont., 

 p. 92-94.) 



Lima vel littora Oceani Pacifici inter 8° et 13° latitudinis 

 australis, ubi saepe terra quatitur j fulgura ex longinquo tan- 

 tum conspiciuntur, nunquam autem audito tonitru. Folia a 

 nullo irabre, sed a copioso rore madent, coelo per medium 



annum velato, nubilo 22*4° . 



(Interdiu 23°-25'5° ; noctu 15°-17°, Calor max. 28° 5 

 min. 13°). 



Sylvee Orinocenses summse vastitatis, ob aestus fere intolera- 

 biles, immanibus serpentibus, crocodilis, trigride jaguare 

 atque vario et malefico genere animalium infestae. Per tot 

 secula homines Europaeos latuerunt. Alt. 70-90 hex. ; cal. 

 med 27-6°. 



Ripce fluminis Guainia:, 2l Hispanis Rio Negro dicti, quod 

 Orinoci aquas per Cassiquiarem affluentes ad Amazonum 

 amnem transmittit. Regia magnee solitudinis propter limites 

 Guyanse et Brasilia^ fe^e sine humani cultus vestigio, fruti- 

 cum et procerarum arborum ferax, nec gignendse herbse apta. 

 Obumbratus earn percurrit amnis et magnam ibi aquarum 



