As I was scanning the chemical journal I heard a bell ring and turning about I saw that a metal box had slid forth upon a side board from an opening in the wall. In this box I found my dinner which I proceeded to enjoy in solitude. The food was more varied than in the hospital. Some was liquid and some gelatinous, and some firm like bread or biscuit. But of natural food products there was nothing save a dish of mushrooms and a single sprig of green no longer than my finger, and which, like a feather in a boy's cap, was inserted conspicuously in the top of a synthetic pudding. There was one food that puzzled me, for it was sausage-like in form and sausage-like in flavour, and I was sure contained some real substance of animal origin. Presuming, as I did at that moment, that no animal life existed in Berlin, I ate this sausage with doubts and misgivings. The dinner finished, I looked for a way to dispose of the dishes. Packing them back in the container I fumbled about and found a switch which set something going in the wall, and my dishes departed to the public dishwasher. Having cleared the desk I next turned to Armstadt's book shelves. My attention was caught by a ponderous volume. It proved to be an atlas and directory of Berlin. In the front of this was a most revealing diagram which showed Berlin to be a city of sixty levels. The five lowest levels were underground and all were labelled "Mineral Industries." Above these were eight levels of Food, Clothing and Miscellaneous industries. Then came the seven workmen's residence levels, divided by trade groups. Above this were the four "Intellectual Levels," on one of which I, as a chemist had my abode. Directly above these was the "Level of Free Women," and above that the residence level for military officers. The next was the "Royal Level," double in height of the other levels of the city. Then came the "Administrative Level," followed by eight maternity levels, then four levels of female schools and nine levels of male schools. Then, for six levels, and reaching to within five levels of the roof of the city, were soldiers' barracks. Three of the remaining floors were labelled "Swine Levels" and one "Green Gardens." Just beneath the roof was the defence level and above that the open roof itself. It was a city of some three hundred metres in height with mineral industries at the bottom and the swine levels--I recalled the sausage--at the top. Midway between, remote from possible attack through mines or from the roof, Royalty was sheltered, while the other privileged groups of society were stratified above and below it.