The trade of Chicago is enormous. Its chief items are grain, live-stock, meat products, and lumber. It principally manufactures iron and steel, wood, brick, leather, chemicals, boots and shoes, cigars and tobacco. The next day after our return to the Chicago Harbor in the evening, Mrs. Dr. McDonald of Chicago accompanied by her brother, Mr. Bernard, paid us a visit on board the "Marguerite." Miss Campbell made the acquaintance of this amiable lady during her last trip to Europe; and they were traveling-companions, spending many pleasant days journeying together in the old world. The WOMAN'S BUILDING was the first structure to be inspected after our next arrival on the Exposition Grounds, according to the programme for that day. It represented a great museum filled with countless contributions made by women. The superb displays of paintings, ceramics, art work, manufactures, liberal arts, embroideries, fancy work, laces; moreover, dentistry, surgery, authorship, pedagogy, etc., and works of female artisans--evinced that womankind is able to compete with man, not only in the arts and sciences and in the more delicate achievements of handiwork, but in almost every department of human activity. Even the exterior of this handsome building, erected in the style of the Italian renaissance after the design of Miss Sophia G. Hayden of Boston--with its exquisite sculptural decorations--executed by Miss Alice Rideout of St. Francisco--bore testimony to the fact, that women are entitled to enter into competition with their male colleagues. Here, we beheld exhibits forwarded to this unique structure by women of every clime and section of the globe. Even ladies of European monarchal families were represented--the Queen of England and her daughters by works of art--the Empresses of Germany, Russia, and Austria as well as the Queen of Italy by costly laces--often the work of their own hands--and invaluable jewels--with romantic histories. The decorative needle-work exhibit constituted a very selected and complete collection; there being offered to view pieces of embroidery to the value of $8,000. All that was to be seen in this edifice proved the opinion that women are justified in demanding a position equal to men.