Soda Glass Pneumatic Trough, 30 x 12.5cm Lab Supplies_Tongs Five-ohm reference coil non-inductively wound

Five-ohm reference coil non-inductively wound from double silk-covered constantan inside a transparent tube

and stirrer for thermal-mixing measurements of specific heat and heat of reaction

sized so the heavier D cell stays seated when student-built circuits are picked up

producing oxygen's characteristic emission lines for spectroscope viewing of atomic-emission and quantum-energy levels

5mm metric threads

Soda Glass Pneumatic Trough, 30 x 12.5cm Lab Supplies_Tongs Five-ohm reference coil non-inductively woundSoda glass pneumatic trough measures 30 x 12. 5cm for large scale gas collection over water and chemistry demonstrations.