The Spherical Densiometer Model-A is a precision instrument designed for measuring forest overstory density. This professional-grade tool features a spherical crown design housed in a handsome wooden case with brass hinges. The convex mirror surface includes a gridded overlay for accurate canopy measurements. Perfect for forestry professionals and researchers, this densiometer comes with detailed instructions for proper usage, including specific positioning guidelines (12-18 inches in front of body at elbow height). The instrument allows for systematic measurement of canopy openings through its quarter-square grid system, with each dot representing a percentage of coverage. The built-in level ensures accurate readings from any location. This Model-A version is ideal for taking multiple readings facing different directions (North, East, South, and West) to calculate average canopy density. The compact design and durable construction make it suitable for field work while maintaining precision in measurements. Each unit comes complete with usage instructions engraved on the lid for easy reference.