Bui. 67, Bureau of Plant Industry, U. S. Dept. of Agriculture. 



Plate 111. 



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Fig. 1. -Pyramid Hill, Sec. 18, T. 18, R. 15. Horses Digging for Water in the 

 Sands of an Arroyo, September, 1902. 



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Fig 2 -Looking South from the Top of Pyramid Hill, Showing General Char- 

 acter OF Fenced Area, October, 1902. 



THE LARGE INCLOSURE. 



