Sanahill Spherical Crown Densiometer, Convex Spectrophotometer  (1%)

Convex Model A Helpful when establishing spacing standards in forest thinning and determining light requirements for regeneration. Features a mirror reflector engraved with a cross-shaped grid of 24 quarter-inch squares to delineate a plot overhead. Slightly offset convex model when using so your head does not appear in grid. Walnut instrument case is 3” x 3”. Built-in leveling bubble. Operating instructions included.