The Sunshine Recorder is used for the accurate measurement of the duration of bright sunshine at a place.
The Sunshine Recorder consists of a glass sphere mounted concentrically in a section of a spherical bowl. Three overlapping grooves are provided in the bowl to take cards suitable for different seasons of the year. The instrument is mounted on a heavy base like marble. The scale of degrees of latitude from -5 degree through 0 degree to + 45 degree. The glass sphere with the glass support an bowl can be tilted, adjusted and clamped at an angle to suit the latitude of the station. The focused rays of Sun burn a trace on the card to indicate the period of bright sunshine during the day. |