Aluminum Extrusion Optical Bench Glass Flasks_Boiling Flasks Thirty-centimeter terrestrial globe mounted on

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

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

Decade capacitance box stepping 0

Used to demonstrate galvanic-cell principles

Aluminum Extrusion Optical Bench Glass Flasks_Boiling Flasks Thirty-centimeter terrestrial globe mounted onSolid 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.