. In & around the Grand Canyon; the Grand Canyon of the Colorado River in Arizona . s forward, then recede, thenagain come forward, and thus make a series of capesand bays, which reaches for an extended distancein each direction. This irregularity of the muralface accounts for a peculiarly charming echo, whichmay be observed by the curious. Turning onesface to the rim and giving a loud hallo, the voiceseems to enter the bays of the serrated cliffs androll around each promontory in turn. The resultis singular. First, the voice is given back as froman immense distance, but rapidly
. In & around the Grand Canyon; the Grand Canyon of the Colorado River in Arizona . s forward, then recede, thenagain come forward, and thus make a series of capesand bays, which reaches for an extended distancein each direction. This irregularity of the muralface accounts for a peculiarly charming echo, whichmay be observed by the curious. Turning onesface to the rim and giving a loud hallo, the voiceseems to enter the bays of the serrated cliffs androll around each promontory in turn. The resultis singular. First, the voice is given back as froman immense distance, but rapidly it swells out and re-echoes with great volume,as if shot forth from the farthest recesses of the bay,to receive a final great impetus as it reaches the verypoint of the nearest promontory. Then it sinks THE GRAND CANYON 249 again, to once more emerge in power, and thus itswells and dies down, again and again, until the lastpromontory of the wall is reached, when, like the finalcrack of a whip, it gives one last hallo with a vimand energy that is simply startling, and the echo. NOXCOXFORMABLE STRATA ON ReD CANYON TrAIL. disappears. The time taken for the echoes is fromnine to twelve seconds. Desirous of testing the figures given as to thelieight of Hotel Camp and the river, Hon. T. of Pasadena, and Mr. W. H. Jackson, thecelebrated artist-photographer, made a series ofcareful measurements with aneroids, which hadbeen tested on a variety of occasions with the bulle-tined measurements of the United States Geologi- 250 IN AND AROUND cal Survey. These measurements showed that thegeneral idea of the Canyon depth at this spot wasmuch exaggerated. The elevation at Hotel Campwas found to be seven thousand feet, and at the rivertwenty-seven hundred feet, thus giving a direct de-scent of forty-three hundred feet, as the differencebetween the elevations at the upper and lowerlevels. From the standpoint of the geologist, whetherexpert or student, the Old Trail is much more in-ter
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