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Fig. 21. Hamers Cave east of Mitchell, Ind. The water from this cave fur- 
nishes the supply for the two Lehigh cement plants at Mitchell. The picture shows 
the overflow from the dam. Water higher than usual. 
Vig. 22. The “Gulf” of Lost river at Orangeville, Ind. Here the roof of the 
cave in which the river flowed has collapsed and the stream comes to the surface, 
