Hare's Apparatus for Comparing Liquid Densities, 25" Material_Iron dropping into the Worcester Circuit

dropping into the Worcester Circuit Board Kit for telegraph work

a 45mm hollow equilateral acrylic prism holds varied liquids for refraction-index-by-medium investigations

this battery box adds insulated terminals and prevents short-circuits from rolling cells touching exposed lab metalwork

dual bore sights

Greatly-enlarged cardiac muscle model exposes myocardial fiber structure

Hare's Apparatus for Comparing Liquid Densities, 25" Material_Iron dropping into the Worcester CircuitThree 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.