Optically Worked Double Convex Glass Lens, 150mm Focal Length, 38mm Diameter Entomology & Zoology_Entomology Supplies Hand-painted arterial red and venous

Hand-painted arterial red and venous blue vessels trace the full systemic and pulmonary circulation across a mounted human figure for cardiovascular teaching

with identical volumes across specimens for direct mass-density comparison

and specific-heat comparisons

gripping cylindrical items from 15 to 60 mm alongside an integrated boss head for retort rods

teaching electromagnetism

Optically Worked Double Convex Glass Lens, 150mm Focal Length, 38mm Diameter Entomology & Zoology_Entomology Supplies Hand-painted arterial red and venousOptically worked glass double convex lens with a 150mm focal length and 1. 5 inch diameter, polished with ground edges for image formation experiments in introductory optics.