Hare's Apparatus for Comparing Liquid Densities, 25" Material_Iron Three-legged spherometer with legs spaced

Three-legged spherometer with legs spaced 40 mm apart and a vertical scale reading -10 to +10 mm at 0

this replacement key matches the goggle sanitizer cabinet lock for classroom stockroom maintenance

Greatly-enlarged cardiac muscle model exposes myocardial fiber structure

dual bore sights

dropping into the Worcester Circuit Board Kit for telegraph work

Hare's Apparatus for Comparing Liquid Densities, 25" Material_Iron Three-legged spherometer with legs spacedThree limbed glass tube on a 61cm scaled wooden stand with a pinch clamp on the center limb, comparing liquid densities by the differential heights of drawn columns.