Aluminum Extrusion Optical Bench Glass Flasks_Boiling Flasks Straight receiver adapter with cone

Straight receiver adapter with cone in borosilicate glass features 14/23 socket and cone for distillation collection and apparatus connections

111110 megohms across seven cascaded decades

sized for direct-reading resistance measurements across student loads

Designed for liquid-fill Snell's-law work at smaller scale

Thirty-centimeter terrestrial globe mounted on a graduated meridian arc with accurate modern political boundaries

Aluminum Extrusion Optical Bench Glass Flasks_Boiling Flasks Straight receiver adapter with coneSolid aluminum 2 meter bench with double sided graduations, four riders, a 20,000 hour LED on a 12V supply, six 40mm lenses (+50 to +500 and 50 to 100mm), mirror, and graduated screens.