heigh

A the point where we first met this formation it was 120 fee in thickness; following up the river course, the surfac imperceptibly rose and the mass became thicker, so that a forty miles above the first station it was 320 feet thick What the thickness may be close to the Cordillera, I hav no means of knowing, but the platform there attains a heigh of about three thousand feet above the level of the sea we must therefore look to the mountains of that great chai for its source; and worthy of such a source are streams tha have flowed over the gently inclined bed of the sea to distance of one hundred miles.

Here and there a peak or ridg of grey quartz rock breaks through the smooth surface Every one has heard of the climate of these regions; i may be compared to that which is experienced at the heigh of between one and two thousand feet, on the mountains o North Wales; having however less sunshine and less frost but more wind and rain.