THE NITRATE DEPOSITS OF CHILE 



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mostly of iodine. Tliis is tlien sublimed and condensed, when it is 

 deposited in black scaly flakes of crystalline iodine. 



Fig. 5. — Nitrate mining in the province of Tarapaca, Chile. 



The water for the nitrate works is obtained mostly from wells in 

 the pampa, and is often gotten in considerable quantities at depths 



