The Vienna Exposition Building

An exchange frives tbe followmg deserción of tbe Expositior. buildinjr and groimds at Yienna : "The di tingi i h'ng feature of the straofcura is a vast dome erected in the center of tbe long, low building. Tbis dome is 3ó feet in diiunoter and 275 faut high. I s diameter is more thun twice that of St. Peter's in Romp. The greatcst diameter of the dome of the Capítol at Washington is )'óö feet, but the Capítol domo is tiio higher of the two if the ineasurement given for that at Vienna is from the ground. This vast dome and rotunda form the oenter of a main gallery or nave, 82 feet wide and 2,968 feet long-, orossed by 1G transepts 49 feet wide, 672 feet long and 32 feet in height. The arrasgement of the exposition i an allotnieiit of spaoe to the nations in thoir order, from eaet to west on the map of the globe. The 24 oonrts between the transrpts, each 072 by 114 feet, have been left for partorre effect and aucesa of liglit, but inay be pasily incorporated with the building. Theexpo sition grounds will be a city in themselves, the whole area of nearly 60(1 acres being occupied by various ütruciuros, with parterres and parks and forest trees of the Emperor's deer park betwren, and a superb setting and background for all."