Optically Worked Double Convex Glass Lens, 200mm Focal Length, 38mm Diameter Features_Spout this enlarged Hydra dissection model

this enlarged Hydra dissection model reveals internal anatomy

Taenia solium tapeworm model demonstrates parasitic anatomy

exposing every wire and hammer so students trace the bell's electromagnetic action

Wide-field 100mm reading magnifier with a 15cm focal length

sized for resistivity experiments and rheostat construction where small-cross-section copper-nickel is required

Optically Worked Double Convex Glass Lens, 200mm Focal Length, 38mm Diameter Features_Spout this enlarged Hydra dissection modelOptically worked glass double convex lens with a 200mm focal length and 1. 5 inch diameter, polished and ground for image formation and refraction demonstrations in physics.