Optically Worked Double Convex Glass Lens, 150mm Focal Length, 38mm Diameter Entomology & Zoology_Entomology Supplies Closing to 3m and extending

Closing to 3m and extending to 9m

teaching electromagnetism

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

Benchtop hydro-electric power station at 13 by 9 by 7

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

Optically Worked Double Convex Glass Lens, 150mm Focal Length, 38mm Diameter Entomology & Zoology_Entomology Supplies Closing to 3m and extendingOptically 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.