PERPETUAL SNOWS cap Andean heights about the broad val- 

 leys and rolling plateaus where the Quechuas carry on their 

 efforts at primitive agriculture. Above is a typical farmyard, 

 with pigs, chickens, cattle, burros, and dogs in evidence. The 

 burro, brought into service as a burden-bearer by the Spanish, 

 is rapidly replacing the llama in this region, although the llama 

 was a domesticated animal in the earliest known times. 



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