Jorullo

Jorullo, a volcanic mountain in the Mexican state of Michoacan, 4315 feet above sea-level, and 1640 feet above the plain on which it stands, is about 150 miles WSW. of Mexico city, in 19° 9' N. lat. and 103° 51' 48" W. long. It was thrown up during one night, 29th September 1759, after several months of subterranean convulsions. The plain on the northern side is inflated like a gigantic bladder, the surface consisting of lava and cinders—a phe- nomenon to which the people give the name of malpays; it has an elevation of 40 feet above the rest of the plain, and is convex, rising in the centre to 535 feet. The southern slope of the mountain is covered with luxuriant vegetation from base to summit.