Plain End Single Cone Adapter, 14/23, 5 inch Shank, Borosilicate Glass Ends_Button perforated at 1cm intervals along

perforated at 1cm intervals along 12 axes with six moveable pins for torque and rotational-energy investigations

ground polished edges and optically worked surfaces giving long-bench divergence flexibility in refraction work

Base-mounted 12V 24W SBC lamp with 4mm socket connections

Glass double-concave lens at 50mm diameter and 100mm focal length

For Archimedes' principle experiments

Plain End Single Cone Adapter, 14/23, 5 inch Shank, Borosilicate Glass Ends_Button perforated at 1cm intervals alongPlain end single cone adapter in borosilicate glass features 14 23 cone with 5 inch shaft for chemistry apparatus connections.