The exposition really consisted of five separate exhibitions, which were located in different parts of the city and were practically independent of each other. These were the International Exhibition of Railways and Land Transports, the International Exhibition of Agriculture, the International Exhibition of Hygiene, and the National Exhibitions of Industry and Arts. The first mentioned was perhaps the most important, for it consisted of a display of every kind of land transportation from animal traction to steam and gasoline. There were special sections devoted to each phase of railways, from the building of stations to the equipment of the finest trains in the world, including all systems in general use; other sections were devoted to tramways operated by the various kinds of power, automobiles and all forms of motor cars, etc. Nothing was overlooked to make this transportation exhibit the most complete ever held in the world. Six sections in a choice location, composing about fifteen thousand square yards, were assigned for United States exhibitors. Great Britain, on the other hand, had asked for and was given more than three times that amount of space. This condition cannot be blamed upon the Argentine government, however, as the United States commission secured all the space that they asked for, and the commissioners found it difficult to fill their allotment. The Exhibition of Hygiene was also important in this age when science has made so much advance in overcoming the obstacles placed in the way of health by nature. This included buildings devoted to hygienic sports, hygiene of dress, naval and military hygiene, ventilation and calefaction in general, sanitary work of cities, hospitals, surgical instruments, and other allied subjects. The agricultural exhibition was particularly devoted to live stock, and the other exhibitions are made clear by their nomenclature.