. Travels amongst the great Andes of the equator . rnand western sides of a crater, of which the northern and easternsides may have fallen, and now lie buried under the glaciers at thesummit. This, however, is pure conjecture. not exceeding about 03 inch in length, and two or three which in structure,dichroism, and parallel extinction agree with hypersthene. There are scatteredcrystals of hematite and scales of iron-glance. . The ground-mass appears to be a•clear glass thickly studded with dusty ferrite, and with minute crystallites in part,at least, felspar. The rock is, therefore, an augite-
. Travels amongst the great Andes of the equator . rnand western sides of a crater, of which the northern and easternsides may have fallen, and now lie buried under the glaciers at thesummit. This, however, is pure conjecture. not exceeding about 03 inch in length, and two or three which in structure,dichroism, and parallel extinction agree with hypersthene. There are scatteredcrystals of hematite and scales of iron-glance. . The ground-mass appears to be a•clear glass thickly studded with dusty ferrite, and with minute crystallites in part,at least, felspar. The rock is, therefore, an augite-andesite.—Prof. T. G. Bonney,Proc. Royal Soc, June 19, 1884. 1 There is a rough track all the way up Yacu-larca to Abraspungo. As we didnot descend by this path on the western side, I am not aware what direction ittakes, after crossing the pass. 2 It would be interesting if this tradition could be verified, as it might givea clue to the age of the glaciers which now completely envelop the top of themountain. CHAP. XVII. SNOW-BLIND AGAIN. 31. CARIHUAIRAZO, FROM THE SOUTH. Occasional glimpseswere obtained through, theclouds for a few hundredfeet in various directions,but whilst on the summit weneither saw Chimborazo nor the other peaks of Carihuairazo ; andwe returned to camp uncertain where we had been. At 4 clouds opened, and shewed that we had stood on the westernof the two principal peaks (that nearly in the middle of theengraving), which is distinctly, though slightly, lower than theeastern one. The rate of ascent on this day was eleven feet per minute(3138 feet in 285 minutes).1 Taking into consideration that thiswas their first experience upon steep snow, David and Campanacame out well, and they were greatly elated at the prospect oftheir promised ascent of Chimborazo. Presently their joy wasturned into mourning. In a few hours the whole of us were 1 Left camp and arrived on summit Left at ;came down fast; never lost sight of the
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