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Show PLATEAU OF CAXA~ARCA. 415 veloped for days in dense mist, or visited by violent and formidable showers of hail-consisting not merely of hailstones of different spherical forms, usually a good deal flattened by rotation, but also sometimes of less regular forms, the hail having run together into thin plates of ice (papa-cara) which cut the face and hands. At such times, I have occasionally seen the thermometer sink to 7° or 5° Reaumur (47°.8 and 43°.2 Fahr.) and the electric tension of the atmostphere, measured by Volta's electrometer, pass in a few minutes from positive to negative. When the temperature sinks below 5° Reaumur (43°.2 Fahrenheit), snowfalls in large and thinly scattered flakes. The vegetation of the Paramos has a peculiar physiognomy and character, from the absence of trees, the short close branches of the small-leaved, myrtle-like shrubs, the large sized and numerous blossoms, and the perpetual freshness of the whole from the constant and abundant supply of moisture. No zone of alpine vegetation in the temperate or cold parts of the globe can well be compared with that of the Paramos in the tropical Andes. The impressions produced on the mind by the natural characters of these wildernesses of the Cordilleras are heightened, in a remarkable and unexpected manner, from its being in those very regions that we still see admirable remains of the gigantic work, the artificial road of the Incas, which formed a line of communication through all the provinces of the Empire, extending over a length of more than a thousand English geographical miles. We find, placed at nearly equal distances apart, stations consisting of dwelling-houses built of well-cut stone; they are a kind of Caravanserai, and are called Tambos and sometimes Inca-pilca (from pinca, the wall?). Some of them are surrounded by a kind of fortification; others were constructed for baths, with arrangements for conducting hot water; the larger were designed for the use of the family of the Monarch himself. I had previously seen measured, and drawn with care, buildings of the same kind in a good state of preservation at the foot of the volcano of Cotopaxi, near Callo. Pedro de Ciega, writing in the 16th century, called them "Aposentos de Mulalo." (3) In the pass between Alausi and Loxa, called the Paramo del Assuay-( a much frequented route across the Ladera de Cadlud, 14,568 French or 15,526 English feet above the level of the sea, or almost equal |