In hospitals, the question of floor-space is extremely important, as it regulates the distance between the sick inmates and the convenience of nursing. Assuming each bed to be 3 feet wide and 6½ feet long, the distance between any two beds should be at least 5 feet. This makes the wall-space for each bed 8 feet long, and allows from 80 to 96 square feet of floor-space per bed. At St. Thomas’s Hospital, London, the floor-space is 112 square feet, and in fever hospitals it is from 150 to 300 square feet per bed. In regard to the ventilation of hospitals, it has been well said that nothing less than too much is enough. =Means of ascertaining Cubic Space.=—Circumference of a circle = Diameter (D) × 3.1416. Area of circle = D^2 × .7854. Area of square = square of one of its sides. Area of rectangle = product of two adjacent sides. Area of triangle = base × 1∕2 height, or height × 1∕2 base. Area of ellipse = product of the two diameters × ·7854. Circumference of ellipse = half the sum of the two diameters × 3·1416. Area of any polygon found by dividing into triangles, and taking the sum of their areas. Cubic capacity of a cube found by multiplying the three dimensions together. Cubic capacity of a cylinder = area of base × height. Cubic capacity of a cone or pyramid = area of base × 1∕3 height. Cubic capacity of a dome = area of base (circle) x 2∕3 height. Cubic capacity of a sphere = D^3 x ·5236. Area of segment of a circle found by adding to 2∕3 of product of chord and height, the cube of the height divided by twice the chord. (Ch x H x 2∕3) + H^3∕2 Ch _Give the dimensions of a circular ward for 12 patients, each to have 1,750 cubic feet of available air-space._ Capacity of ward = 1,750 X 12 = 21,000 cubic feet. If we allow 120 square feet floor-space for each patient, then the total floor-space will be 1,440 square feet. Consequently the height of the ward = 21000∕1440 = 14·75 feet. Area of circle = D^2 x ·7854. 1,440/·7854 = D^2. Therefore D = +43·2 feet.+ Circumference of circle = D x 3·1416. = 43·2 x 3·1416. = +135·7 feet.+ The dimensions of the circular ward required are therefore a height of 14·75 feet, diameter of 43·2 feet, and circumference of 135·7 feet. _Find the cubic capacity of a circular hospital ward 28 feet in diameter, 10 feet high, and with a dome-shaped roof 5 feet high._ Area of floor-space = D^2 x ·7854. = 614·8 square feet. Cubic capacity of the cylinder below the dome is 614·8 x 10 = 6,148 cubic feet. Cubic capacity of dome = 614·8 x 2∕3 x 5 = 2049·3 cubic feet. Total cubic capacity of the ward = 8197·3 cubic feet.