PHYSICAL GEOGRAPHY OP PERU. 3q 



clouds ever pass between those vacancies, so as to occasion 

 partial showers of rain ? 



6. Does the wind never blow from off the Pacific Ocean, 

 upon those distri6ls which are exempt from rain ? 



7. If it be so, does it not bring with it clouds from off the 

 Pacific Ocean ? and, if so, v/hat becomes of those clouds ? 



8. It is stated, that in the night dews fall which support 

 vegetation in those districts. Have the sources of these dews 

 been ascertained ? Are they the result of evaporation from 

 the soil only, during the heat of the day ; or are they not, on 

 the other hand, partly created by the evaporation from the 

 adjacent seas ? 



9. If created by evaporation from the soil, what is the ori- 

 ginal source of the moisture of the soil ? 



10. Are there springs in those distri6ts r are they numerous 

 and regular ? and what is their source ? 



11. Are there rivulets ? and what is their source ? 



12. What is the breadth, and what the length, of the coun- 

 tries thus exempt from the phenomenon of rain ? 



13. What are the phenomena resulting from its absence ? 



14. Do those distri6ls enjoy a perpetually unclouded atmo- 

 sphere ? Are there rainbows ? Are there any meteors, or fall- 

 ing stars, or thunder and lightning ? And, if these pheno- 

 mena do exist, are they vertical, or are they not in the vicinity 

 of the mountains ? 



15. If the question 13 be not, in its entire sense, applicable 

 to the circumstances, it may further be asked (as Europeans 

 can only ask questions founded on the phenomena of a climate 

 subje6t to rain), whether there be any phenomena peculiar to 

 the climate which cannot be anticipated d priori f 



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