Haus Vaterland metres deep, panoramas, and lighting effects, and served appropriate food; it was an early example of modern theme dining or experiential gastronomy. While the main shows took place in the ballroom, each theme restaurant also had musicians of the appropriate origins on staff to complete the dining experience, including at least six dance bands. A central kitchen occupied the entire top floor, connected to the different dining establishments by pneumatic tubes, through which orders came up, and dumbwaiters, by means of which food was sent down and dirty dishes sent back up; conveyor belts at kitchen level transferred the dishes
Area of a circle ) holds in the limit for a circle. Although often referred to as the area of a circle in informal contexts, strictly speaking the term "disk" refers to the interior of the circle, while "circle" is reserved for the boundary only, which is a curve and covers no area itself. Therefore, the area of a disk is the more precise phrase for the area enclosed by a circle. Modern mathematics can obtain the area using the methods of integral calculus or its more sophisticated offspring, real analysis. However the area of a disk was studied by the Ancient Greeks. Eudoxus