. A naturalist in Mexico : being a visit to Cuba, northern Yucatan and Mexico . e of thirty-five degrees, in much the same manner that coasting is donein Canada. We arrived at the camp foot-sore and weary,and were glad enough to lie down and rest. Our determination showed that the height formerlygiven for the mountain is too low. - After making allow-ances for slight variations, the height of the mountain is18,200 feet. The barometer, at the summit, read , and the temperature was 35*^ Fahr. During the as-cent of the second day, the barometer indicated a drop of .1inch. In 1796, Ferr
. A naturalist in Mexico : being a visit to Cuba, northern Yucatan and Mexico . e of thirty-five degrees, in much the same manner that coasting is donein Canada. We arrived at the camp foot-sore and weary,and were glad enough to lie down and rest. Our determination showed that the height formerlygiven for the mountain is too low. - After making allow-ances for slight variations, the height of the mountain is18,200 feet. The barometer, at the summit, read , and the temperature was 35*^ Fahr. During the as-cent of the second day, the barometer indicated a drop of .1inch. In 1796, Ferrer, by means of angle measurementstaken from the Encero, determined the height to be 17,879feet. Humboldt, a few years later, measured the mountainfrom a plain, near the town of Jalapa, and obtained 17,375feet. He observed, however, that his angles of elevationwere very small, and the base-line difficult to level. In1877, a Mexican scientific commission, composed of , Rodriguez, and ^igil, made the ascent of thevolcano from the side of San Andres, and determined the. < GQ<N CC o < CL SPECIES OF BIRDS. 81 height to be 17,664 feet. Dr. Kaska, not long since, de-termined, by a mercurial thermometer, the height to be18,045 feet. Should our deductions prove correct, thenOrizaba, and not Popocatepetl, must take the first placeamong the mountains of North America. The second nightwas-passed like the first, in hugging the fire. Early on thefollowing morning we returned to San Andres, reachingthere late in the afternoon. The only life observed on thepeak was a Sparrow Hawk, a raven, and a few small leaving San Andres, a word concerning its avi-fauna may not be out of place. As before said, the differ-ence between the birds of San Andres and those of Orizaba,4,000 feet below, was marked. Only three species werecommon to both localities. Nearly all species belonged tonorthern genera. In the town, the only birds observedwere the House Finch, Blue Grosbeak,
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