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A'EARBOOK, PUBLIC MUSEUM, MILWAUKEE 



[Vol. III. 



coated areas were still moist, and showed that the material was even 

 now gathering there as the water evaporated. It was a soft spongy- 

 mass, mostly pure white in color, but sometimes changed to graj^ at the 

 surface from impurities which had been buried in the deposits. A 

 few streaks of a greenish tinge indicated that some copper was also 

 present in the water. 



Fig. 24. — A stalactite of salt hanging from the wall of a 



canyon tributary to Hermit Creek, Grand 



Can3'on, Arizona. 



The stalactites were of great interest, for many of them were of 

 considerable length and nearly all of very curious forms. Instead of 

 being cones suspended vertically from the rock above, these had 

 grown distorted and were twisted and turned in all directions. In ad- 

 dition, many of them had on their sides, long slender threads of salt 

 as may be seen in figure 24 also twisted and curved, which resembled 



