But as a Titan, towering above all these and all others, stood the great Corliss engine, built by George H. Corliss, of Providence, R. I., one of the most remarkable mechanicians and inventors of the century. A modern Samson, dumb as well as blind, its massive limbs of shining steel moved with voiceless grace and utmost apparent ease, driving the miles of shafting and the thousands of connected machines. The cylinders were forty inches in diameter; the piston stroke, ten feet. The great walking-beams, nine feet wide in the centre, weighed eleven tons each. The massive fly-wheel, thirty feet in diameter, and weighing fifty-six tons, made thirty-six revolutions a minute. The whole engine, with the strength of 1,400 horses, weighed 700 tons. Agricultural Hall, built of wood and glass in the form of a nave with three transepts, covered ten acres. The display it contained of agricultural products and implements was the largest ever made. Here the United States stood forth far in advance of all sister nations. Specimens of the rich and deep prairie soil excited the wonder and envy of tillers of impoverished European lands. The great West, with its monster steam-ploughs and threshing machines, placed before the eye the farming methods of a race of giants. The choice and delicate fruits of sunny lands mingled with the hardy cereals of Canada and Russia. Memorial Hall, a beautiful permanent building of granite, erected by Pennsylvania and Philadelphia at a cost of $1,500,000, was given up to art. This was on the whole the poorest feature of the Exposition. America had few works of the first order to show. Foreign nations, with the exception of England, feared to send their choicest art products across the ocean. France, Germany, Spain, Belgium, and the Netherlands, with some other countries, were all represented. Italy, besides paintings, sent many pieces of sculpture. England contributed a noble lot of paintings, including works by Gainsborough and Reynolds. In spite of all, the collection was the largest and most notable ever seen in this country, and throngs crowded the galleries. Horticultural Hall, built of iron and glass in the Moorish style of the twelfth century, also a permanent structure, was erected by Philadelphia. Here, one walked amid the glories of tropical vegetation. Palm, orange, lemon, camphor, and india-rubber trees rose on every hand. The cactus of the desert, rare English flowering plants, strange growths from islands of the sea, here flourished each in its peculiar soil and climate. Outside the building were beds of hardy flowering plants covering twenty-five acres. Besides these five main structures, the United States Building, where the working of the various administrative departments of the Government was shown, attracted thousands of visitors daily. A Woman's Pavilion contained products of female industry and skill. A narrow-gauge railway ran in great loops from building to building.