The Treasury Department--more westward--contained models, pictures, charts, and diagrams elucidating the Marine Hospital Service, Coast and Geodetic Survey, the Mint of the United States, the Bureau of Engraving and Printing, the U.S. Lighthouse Establishment, the Bureau of Internal Revenue, the Register's Office, and the Bureau of Statistics. In the adjoining division assigned to the Postoffice, we could trace the subject of transportation which plays so prominent a part in the history of civilization--by means of models, drawings, and pictures from the most incipient stages to the modern uses of steam and electricity. The northwestern portion of this interesting building was given up to the Department of the Interior; embracing the Patent Office, the Bureau of Education, the Census Office, and the U.S. Geological Survey. In the rotunda we viewed the "_Big Tree_," a section thirty feet in length, cut from Sequoia Gigantea, a tree 300 feet high whose diameter at the base covered a space of twenty-six feet. It grew in the Sequoia National Park in the charming clime of California. Under the central dome were also shown 138 colonial exhibits--relics of historic value from days long gone by. The War Department was well represented in all its branches; regarding uniforms and equipage, means of transportation, military engineering, shooting apparatuses, ammunition, etc. Having visited the State and Justice Departments, we repaired to the division in which the government displayed (in the Department of Agriculture) a very complete and comprehensively arranged collection of grains obtained in this and other countries. Very interesting were the adjacent exhibits, presenting to view the topics of food adulteration, entomology, pomology, botany, ornithology, and mammalogy; together with experiments in fibre investigation. Betaking ourselves to the northern division, we were instructed--by various illustrations--of the methods employed by the scientific branch of the Fish Commission in determining the habits, peculiar to denizens of water. Models and apparatuses showed the results of Fish Culture. The displays in this unique building covering almost all the branches of modern science and arts, bore testimony to the fact that the United States now rank with the most powerful nations on the globe; and to this attainment only a little more than one century of development was requisite. This says everything for American enterprise and genius--and a country so young in a very old world. The circumstance of its being a calm evening--with the prospect of a pyrotechnic display later--permitted us to remain on the Fair Grounds longer than we usually did; hence we determined to visit still another structure.