4:92 H. E. Gregory — Reconnaissance of a Portion of tie 



dissipated into air by evaporation, which in this region exceeds 

 four feet per year. The streams are in consequence all 

 ephemeral : even the Little Colorado itself displays a dry floor 

 for several mouths in the year. Following showers, the 

 Moencopie from the east and Cedar Wash from the west, aided 

 by numerous companions, pour quantities of thick muddy water 

 into the Little Colorado, filling its canyon to a height which 

 makes crossing dangerous. Depressions in canyon beds and 



Fig. 1. 



rock basins on divides, which are filled with water by occa- 

 sional showers, are likewise short-lived. Two days after a rain 

 may find a large part of the region without sufficient water 

 for horse and rider. Permanent water of excellent quality is 

 found however in three springs : Tappan, issuing from the 

 contact of lava and sandstones; Al Ranch, bubbling up from 

 joints in shale : and Janus, oozing from the bedding planes 

 between strata of sandstone. Coconino Point, 3000 feet above 

 the bed of the Little Colorado, is also supplied with springs 

 and with fairly long-lived, natural "tanks". 



The region is hot during the summer season, when tempera- 

 tures exceeding 100° may be expected for several days in 

 succession. 



, 



