measure of sunshine
Sunshine: direct sunlight to which a given area is exposed.
Instrument designed to record daily duration of sunshine.
lower sphere clamp
Two clamps secure the glass sphere into the position required to obtain an exact measure of sunshine; this position is based on the coordinates of the meteorological station.
The nut of the leveling screw, which tightens to secure the base plate in a given position.
Screw making it possible to level the instrument along its two axes, north-south and east-west.
lower support screw
Strip of paper, calibrated in hours, that is burned by the Sun’s rays; it registers the duration of sunshine.
Stationary metal support in the form of a triangle; it is comprised of three coupling sleeves, each having a leveling screw.
Adjustable metal support that makes it possible to level the instrument by means of leveling screws.
In the manner of a magnifying glass, it concentrates the Sun’s rays on the sunshine card.
Circular support for the sunshine card.