A minute later and we had reached the surface. Polaris, and her crew, so to speak, had disembarked and we had a cordial handshaking, and then took a stroll around the roof of this immense building. Everything about it seemed to indicate that it was especially designed for the accommodation of business on a gigantic scale. It was built of the semi-transparent material which we had found so common in the district where we had made our homes. The cornice, windows and doors were trimmed with aluminum, which gave it a peculiar grandeur of appearance. MacNair, who was ever ready to make explanations, informed us that this was the Continental Department of Exchange through which all the commercial transactions between the various districts throughout the continent were carried on. This was the chief center of distribution, and bore the same relation to the continent, that the District Exchange bore to the several communities of which it was composed. The community stores made the actual distribution of products to the people. These larger exchanges, District and Continental, did not really handle the products at all, but collected the orders from the consumers and sent them direct to the communities where the goods were wanted, in this way saving very much unnecessary labor in handling and transportation. The actual exchange of commodities was always direct between the producers and the consumers. I did not quite comprehend all this, but it prepared me for the object lesson which was to come. I was keenly alert to everything that was to be seen and heard, as it was valuable material for the book which I now felt sure I would be able to lay before the people of the outer world. It was now noon, and MacNair suggested that it was about time for dinner. "No doubt," he said, "your fifteen hundred miles of travel has given you an appetite." And suiting the action to the suggestion, we all stepped upon an elevator, and descended to the largest dining hall I had ever seen. It seemed that thousands of people were seated at the tables, quietly conversing and enjoying their midday meal. We seated ourselves at a vacant table and Oqua said: "I shall order for all, as our American visitors are not yet perfectly familiar with our customs." And manipulating a button at her side, I was surprised to see the center of the table disappear, but it reappeared before I had sufficiently recovered my equilibrium to ask questions, and it was loaded with the most tempting viands. Oqua explained that these central tables which carried the food stood on the top of an elevator that connected with the kitchen below. That when an order was received, a table was already prepared to take the place of the one which the elevator brought down. Everything moved with quiet celerity; no bustling waiters, and no waiting for orders to be filled.