OCR Text |
Show FOR "SUNNY HOUR" CHARTS Prediction That Office and Factory Buildings of the Future Will Be Furnished With Them. The office and factory building of the future will furnish "sunny hour" charts to Its tenants. These rharta will allow graphically at which windows win-dows of a building the sun will shine at any season of the year and bow long. Tbls useful device consists merely of a circular diagram with a circumference graduated Into 24 parts, numbered from 1 p. m. to 13 midnight, and 1 a. m. to 11 noon, and having radial lines drawn from the center of tbe circle to the times of sunset and sunrise for tbe different months of the year. Through the diameter of the circle 12 noon 12 midnight, la a meridian. "The' plan of tbe building used must also have a meridian drawn upon It In Its correct relative position. The chart Is placed on tbe plan of tbe building with the two meridians parallel. paral-lel. To And at what time of day the Bun begins or ceases shining through I any window, a Btralgbt edge Is laid on the chart In such a way that It passes through the center of the clr-, clr-, clo and Is parallel to the wall In which . the particular window la built. Tbe sun will begin or end shining through tbe window at the hour Indicated ' where the straight edge intersects the circle. If the wall runs westerly - of the south, the sun will begin to shine in at the hour Indicated, and If the wall runs easterly of the Bouth. the sun will cease to shine In at the ' I hour Indicated. Power. |